WINTER HAVEN, Fla. (AP) -- Polk County authorities are investigating a crash between an ATV and a bicycle that killed one person and critically injured three others.

A sheriff's office statement says a witness called to report late Saturday that a black all-terrain-vehicle was speeding without its lights on when it swerved to avoid hitting a bicycle. The ATV landed upside down in a ditch and the bicycle was found mangled nearby.

It's not immediately known who was on the ATV and who was riding the bicycle. The fatality was identified Sunday as 18-year-old Israel Bible Jr. Injured were 19-year-old Danny Bermea Jr., 21-year-old Ginno Cano and 21-year-old Jose Luis Cano-Mendez.

None appeared to have been wearing helmets.

Authorities say speed and impairment may have been a factor in the crash.