Twenty-three people died Sunday when a bus on a remote mountain road in Brazil's Alagoas state plunged into a ravine, regional authorities said. 

Rescue services confirmed that 22 died on the spot and another person, a pregnant woman, succumbed after being taken to hospital, the Alagoas state government said in a statement.  

Brazilian media said the bus had been carrying 40 passengers and "dozens" of them were injured. The accident occurred near the town of Uniao dos Palmares. 

State Governor Paulo Dantas declared on social media platform X three days of mourning over the "tragedy." 

The bus went off the road in an area difficult to access in a mountainous region called Serra da Barriga.