Authorities in northeastern India say a wooden bridge has collapsed, killing at least 31 people who fell into a swirling river. Rescuers say at least 50 people were injured.

Officials say the people had gathered on the bridge Saturday to watch a cultural festival in Bijanbari in West Bengal state, about 30 kilometers from Darjeeling.

Authorities say the death toll will likely rise.

Media reports say the bridge had been weakened by an earthquake last month.