Police have fired rubber bullets and tear gas at protesters in parts of the Mozambique capital on the third day of riots over rising food prices.
Elsewhere, Maputo was calm, with shops and businesses reopening and long queues of people waiting to buy bread and petrol.
Ten people have been killed and 443 injured since the riots began, Health Minister Ivo Garrido said on Friday.
There have also been clashes in the central city of Chimoio.
Six people were shot by police there after protesters tried to stop markets opening, Lusa news agency says.
The latest violence in Maputo was in the suburbs of Benfica and Hulene on the city's outskirts.
However, Friday's clashes were relatively minor and the police say they have restored order.
The protests began after the price of bread rose by at least 20% in one of the world's poorest countries.
Trade and Industry Minister Antonio Fernando said that the government was striving to make the country less dependent on imported food.
'Irreversible'
On Thursday, government spokesman Alberto Nkutumula condemned the violence on the streets of the capital and appealed for people to remain calm, but said the government would not reconsider increasing the price of bread.
"The price hikes are irreversible," he told reporters.
Troops were deployed on the streets of the capital on Thursday to clear barricades, debris and burning tyres left by protesters. Sporadic gunfire was heard during the day.
Many witnesses say police have used live bullets to break up the crowds but this has been denied by officials.
Home Affairs Minister Jose Pacheco said the government was trying to trace the source of text messages circulating among the city's residents, urging them to continue protests on Friday.
"I received an SMS saying the strike must continue for three more days," Abel Salvador Bild, a street vendor in the capital, told AFP news agency.
The violence has been the worst in Mozambique since 2008, when clashes between police and rioters over rising prices left at least four people dead.
South Africa's National Union of Mineworkers (NUM) has said that its members at Northam Platinum have started a strike over pay.
Northam management is offering an 8% pay rise, but the miners are pressing for 15%.
The NUM says it represents over 8,000 miners out of Northam's 8,600 total workforce.
A union spokesman told the Reuters news agency it was not yet clear how many workers were supporting the action.
The NUM's Lesiba Seshoka said: The strike has already begun, but we will know later whether it will be the entire membership involved."
This is the latest in a series of walk-outs in South Africa over pay.
Public sector employees, including nurses, police officers, teachers and immigration staff, have been on strike, demanding an 8.5% rise in pay - they have been offered 7.5%.
Unions representing these 1.3m state workers are expected to announce later whether they will accept a government wage offer.
Last month, the Automobile Manufacturers Employers Organisation (Ameo) and the metal workers union, Numsa, accepted a 10% pay rise after an eight-day strike.
Earlier in the summer, workers at the electricity company Eskom took action which lead to a 9% pay offer and a housing allowance.
South African inflationary pressures were described last week as "relatively benign" by the country's central bank Governor, Gill Marcus. She said July's inflation rate of 3.7% was "lower than anticipated".
One of the boats was carrying up to 300 people when it caught fire on the Kasai river near the border with Angola.
Information Minister Lambert Mende Omalanga told that the BBC the vessel had been transporting fuel and was not supposed to be carrying any passengers.
In the other accident, at least 24 people died in the province of Equateur when a boat capsized on the Ruki river.
The boat had up to 100 people on board, Mr Mende told the BBC.
A spokeswoman for Equateur's provincial government, Rebecca Ebala, said more than 70 people were believed dead. Fifteen survivors had so far been found, she added.
Officials are investigating why the boat was sailing at night without lights.
'Full of people'
The accident in Kasai-Occidental province happened the previous day.
"It was not a passenger ferry. It was a ferry which was carrying fuel," Mr Mende told the BBC.
"It seems that at least 24 people were on board because they have been rescued. But some other people might have died. And we don't have the report because this boat is not supposed to carry passengers."
One of the survivors confirmed that fuel drums on board the vessel had caught fire before it capsized near the village of Mbendayi.
Romaine Mishondo said the boat was so crowded it had reminded her of "a whole market in the village full of people".
When it began to sink and people began jumping overboard, local fishermen ignored their pleas for help, she added.
"Fishermen attacked the boat and started beating passengers with paddles as they were [trying] to loot goods," she told the Associated Press. "The fishermen refused to save passengers, instead taking goods into their pirogues [small, flat-bottomed boats]."
"I survived because I hung onto a jerry can until another vessel passed by the scene and rescued us."
Boats and ferries are commonly used in DR Congo, which has few viable roads or railways but several major lakes and rivers.
However, the vessels are often overloaded or badly maintained, and accidents are commonplace.
Guatemalan authorities say at least 36 people have been killed in landslides caused by weeks of heavy rains.
In the worst incident, a hillside collapsed on a crowd of volunteers as they tried to dig out a bus buried by a previous mudslide.
At least 20 bodies have been recovered, but the search for around 40 people still missing has been suspended for fear of further landslides.
President Alvaro Colom has called the disaster a national tragedy.
He visited the scene where rescuers were digging frantically to find people buried in thick mud at kilometre 171 of the Inter-American highway north of Guatemala City.
"This weekend alone, we have seen damage comparable to what we experienced with Agatha", Mr Colom said, referring to a tropical storm that killed 165 people in May.
"It's painful that poor people always pay the price for natural disasters."
Desperate search
Local police officer Pascual Tuy said he was in a group that rushed from the village of Nahuala to help with picks and shovels when they heard vehicles had been buried.
He said volunteers were able to pull several people out of the mud, and were still digging when the second landslide struck.
"The mountain was making a noise like an earthquake but people would not leave" he told the Associated Press. "They were being stubborn and did not get out".
Officer Tuy said he ran for his life and the mud only reached his legs.
Rescue work resumed after the second landslide, but was then suspended because of heavy rain.
The government had already advised people to stay off the roads after 12 people were killed when another bus was engulfed by a mudslide on a different stretch of the same road on Saturday.
More than 100km (65 miles) of the Inter-American highway is closed to all traffic, and many other roads have been blocked, with several bridges destroyed by floods.
Record rainfall
Weeks of heavy rain have saturated Guatemala's mountainous terrain, causing hillsides to collapse suddenly and without warning.
Parts of the country have received their highest rainfall in half a century, according to Guatemala's national meteorological institute.
President Colom said the rains had undone all the reconstruction work completed since Tropical Storm Agatha.
On Saturday he declared a state of emergency and asked congress to approve emergency funds for rebuilding.
He said he would also propose a special tax to help pay for reconstruction, saying there were not enough funds available to deal with the disaster.
Police in El Salvador have found a plastic barrel stuffed with $9m (£5.8m) of suspected drug money on a farm in the centre of the country.
Money crammed into a second barrel found nearby is still being counted, police said.
Neighbours had reported "strange movements" on the farm in Penitente Abajo, the attorney general's office said.
Police are still searching the area for money, weapons and drugs.
The two barrels were found buried five metres (16ft) away from each other on the Hacienda El Recolado which reportedly belongs to a Guatemalan national.
It took the police two days to count the bundles of $100, $50 and $20 notes in the first barrel.
"If it turns out that this is the money of drug traffickers, this would be the biggest blow to organised crime in the country," El Salvador's Justice Minister Manuel Melgar said.
The authorities have brought in heavy equipment to dig up the grounds of the property.
According to local media reports an informant told police that $30m were hidden on the farm.