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.
At least four killed in Israeli strike on building in Lebanon's Baalbek
An Israeli strike on a four-storey residential building has killed at least four people and wounded six others in the eastern Lebanese city of Baalbek, with rescue teams working to pull families from beneath the rubble, state news agency NNA said on Wednesday.
Kuwait announces death of child from shrapnel wound
An 11-year-old girl has died of injuries sustained from falling shrapnel on a residential area in Kuwait, the country's Ministry of Health announced early Wednesday.
Philippine lawmakers advance impeachment of Vice President Duterte
Philippine lawmakers ordered Vice President Sara Duterte on Wednesday to respond to impeachment complaints against her after finding substance to allegations involving unexplained wealth, the misuse of public funds and making public threats against President Ferdinand Marcos Jr.
Qatar busts two cells linked to Iran’s Revolutionary Guard
Qatari authorities said they have arrested two cells linked to the Iranian Revolutionary Guard.
GCC condemns Iranian attack on Port of Fujairah
Secretary General of the Gulf Cooperation Council (GCC) Jasem Al Budaiwi has strongly condemned the Iranian attack that targeted the Port of Fujairah in the UAE.
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