A tractor-trailer slammed into a bus taking 25 children of migrant workers to an amusement arcade Friday, seriously injuring five of them, authorities said.

The more seriously hurt youngsters suffered broken bones and head injuries, said Fire-Rescue Deputy Chief Steve Delai.

The 20 other children were taken to the hospital for treatment of cuts and bruises. Two adults — workers for the Migrant Association of South Florida (search), which was using the bus — also suffered minor immediately filed. The driver of the truck, which was carrying a load of lumber, was not hurt.

"It appears that the bus was in the center lane and the tractor-trailer was in the right lane. For some reason the bus got into the path of the tractor-trailer," Florida Highway Patrol (search) Lt. Pat Santangelo told WPTV.