(CNN) -- The swaying of a suspension bridge led to fears it would collapse and resulted in a stampede that killed 456 people at a Cambodian festival, according to government investigators.
Their initial findings were aired on state-run Bayon television Wednesday.
Police fired water cannons to get people to continue moving across the footbridge, which leads to an island in the center of a river.
"That just caused complete and utter panic," journalist Steve Finch of the Phnom Penh Post newspaper told CNN.
Cambodia has declared Thursday a national day of mourning for those who died Monday in the crush at the annual Water Festival in the capital city of Phnom Penh, the news agency AKP reported. An additional 800 people were injured.
CNN
