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.
Saudi Arabia says danger passed in six cities, including Yanbu
The Saudi Arabian Civil Defence has issued an all-clear on Tuesday after issuing alerts about potential danger in six cities, including Yanbu, the kingdom's main Red Sea oil port, where millions of barrels a day are loaded.
Bahrain, Kuwait, Jordan offer condolences over martyrdom of two UAE servicemen
Bahrain, Kuwait, and Jordan have extended their condolences to the UAE over the martyrdom of its two military servicemen, Major Abdullah Shams Al Menhaly and candidate Saeed Abdullah Al Shamsi, on Monday.
King Charles to host AI executives as threat fears mount
Britain's King Charles will host the leaders of major artificial intelligence companies this week to discuss whether a shared set of principles is needed to guide a technology that has sparked growing warnings about its threat to humanity.
Amazon pauses operations with 21 Air after Miami cargo plane crash
Amazon has announced on Sunday it was pausing operations with Miami-based 21 Air, the cargo carrier that operated the Amazon-branded plane that crashed in Miami, killing five people.
A military funeral has been held for Major Abdullah Shams Al Menhaly and Warrant Officer Saeed Abdullah Al Shamsi, who were martyred while carrying out a training mission in the UAE on Monday.
Syrian President Ahmad Al-Sharaa will speak at the opening of this year’s Arab Media Summit on Monday, the event's organising committee announced.
UAE President His Highness Sheikh Mohamed bin Zayed Al Nahyan has been awarded Albania’s highest state honour, the Grand Star of the Supreme Order of the Eagle, in recognition of his role in strengthening UAE-Albania ties.
