Three wild European bison died on Sunday morning after being hit by a train in Poland’s vast UNESCO-listed Bialowieza Forest in the east, the local police told AFP. 

According to a police spokesman, a herd of Europe’s largest mammals, whose male specimens can reach 900 kilograms (nearly 2,000 pounds), crossed onto the train tracks as a locomotive carrying some 50 passengers between Bialystock and Warsaw aboard was steaming ahead. 

“No passenger was injured but three animals perished in this accident, which happened at 7:00 am, near the village of Witowo,” spokesman Konrad Karwacki told AFP.