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.
US skips congressional review to approve arms sale to Israel
The US State Department said on Friday it has approved a sale worth $151.8 million to Israel for munitions and munitions support, without submitting it for congressional review.
Partial resumption of air navigation in Qatar
Qatar’s Civil Aviation Authority has announced the partial resumption of air navigation, using designated contingency routes with limited capacity.
Kuwait and Qatar thwart fresh wave of Iranian attacks
Kuwait and Qatar reported intercepting multiple Iranian attacks.
After a week of war, Trump demands Iran's 'unconditional surrender'
US President Donald Trump demanded Iran's 'unconditional surrender' on Friday, a dramatic escalation of his demands a week into the war he launched alongside Israel, which could make it more difficult to negotiate a swift end to it.
Ex-rapper's party set to sweep Nepal election
A three-year-old party led by rapper-turned-politician Balendra Shah looked set to sweep Nepal's general election on Friday, trouncing established rivals in a result analysts likened to a "tsunami".
Operations at Dubai International Airport (DXB) have been temporarily suspended, officials said on Saturday.
Emirates has suspended all flights to and from Dubai until further notice, the airline said on Saturday.
UAE air defences, on Saturday, responded to incoming missile and drone threats from Iran, according to alerts from the UAE Ministry of Defence (MOD) and the National Emergency Crisis and Disaster Management Authority (NCEMA).
