At least 42 inmates have been found dead at four prisons in the capital of Brazil's northern Amazonas state on Monday.
Authorities said the victims appeared to have been killed by "asphyxiation" and were discovered during routine inspections at the prison facilities.
Additional reinforcements have been dispatched to boost security, they added, without providing more details.
This comes a day after 15 prisoners were killed in gang clashes in the same city.
Fire in India’s Goa state kills at least 25
At least 25 people, including tourists, were killed in a fire at a popular entertainment facility in India’s Goa state, the state’s chief minister said on Sunday.
India caps airline fares as IndiGo crisis leaves hundreds stranded for fifth day
India capped airfares on Saturday as hundreds of passengers gathered outside Bengaluru and Mumbai airports after IndiGo cancelled 385 flights on the fifth day of a crisis at the country's biggest airline that has crippled air travel.
Pakistan, Afghanistan border clashes kill 5, officials say
Pakistan and Afghanistan exchanged heavy fire along their border late on Friday, officials from both countries said, killing at least five people amid heightened tensions following failed peace talks last weekend.
Gaza talks at critical moment, ceasefire not complete, Qatar's PM says
Negotiations on consolidating the US-backed truce in the war in Gaza are at a "critical" moment, Qatar's Prime Minister Sheikh Mohammed bin Abdulrahman al-Thani said on Saturday.
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