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 rebel-held east Congo kills 24 schoolchildren
A fire in Congo's rebel-controlled city of Bukavu killed at least 24 children as it destroyed two schools and burned down around 300 wooden houses, an official from the rebel administration told Reuters on Thursday.
Trump touts $5,000 payout if Republicans win as Vance waits in wings
President Donald Trump capped the first day of his Republican Party's first-ever midterm convention by proposing to pay every US adult a $5,000 "Trump dividend" if his party wins November's congressional elections.
Search expands after Philippine ferry fire kills five and leaves dozens missing
A large-scale search and rescue operation was underway off the western Philippine island of Palawan on Thursday after a passenger ferry caught fire, killing five people and leaving dozens of passengers missing.
Trump says Iran war to end after US midterm elections
President Donald Trump said he expected the war with Iran to end after the November US midterm elections after the two sides launched their biggest wave of attacks on shipping since the start of the six-month-old war.
At least 20 killed in cargo vessel fire at China shipyard, state media reports
At least 20 people have been killed in a fire aboard a foreign cargo vessel undergoing repairs at a state-owned shipyard in the eastern Chinese city of Qingdao on Thursday, state media reported, with five others still missing.
US military says it struck vessel in Caribbean, killing 3
The US military said on Wednesday three people have been killed in a strike on a vessel in the Caribbean Sea, the latest in a series of attacks that Washington says target "narco-terrorists" but human rights groups condemn as extrajudicial killings.
At least 14 killed in explosion at weapons depot in Syria
At least 14 people were killed and 11 wounded on Wednesday in an explosion at a temporary site used to store weapons and remnants of war near the Syrian city of Sarmada in Idlib province, state television reported.
US hits five Iranian oil tankers after attack on Navy ships
The United States has destroyed five Iranian oil carriers on Tuesday after the Islamic Revolutionary Guard Corps (IRGC) targeted its navy warship with ballistic missiles "twice over the past two days".
Looking Through Your Eyes
Leann Rimes
Mirror Mirror
M2M
Because Of You
Kelly Clarkson
Pinoy Expat Corner
Why did they choose mountain biking as their sport? What makes mountain biking different from regular road cycling?
Pinoy Expat Corner
Welcome to Pinoy Bulletin, your go-to source for staying informed about important announcements, exciting group activities, community events, and job opportunities!
Pinoy Expat Corner
Why is it important for them to preserve Ilokano culture and traditions even while living far from the Philippines?
