Seventeen people died Sunday when a bus on a remote mountain road in Brazil's northeastern Alagoas state dived into a ravine, regional authorities said.

Police were working to identify those killed and to free bodies from the wreckage of the bus, which fell into a ravine more than 20 meters (65 feet) deep, the state government said in a statement.

It said "several" people were injured.

Brazilian President Luiz Inacio Lula da Silva said on the social media platform X that his government "will give all necessary support to state authorities in the assistance, care and support of the victims."

He expressed condolences to the families of those involved in the accident.

Alagoas state governor Paulo Dantas declared on X three days of mourning over the "tragedy."