TAMPA, Fla. (WFLA) — The Polk County Sheriff’s Office is investigating a fiery crash that left two people with injuries Thursday morning.

The crash, which involved a semi-truck and another vehicle, happened at about 3:35 a.m. in the westbound lanes of Interstate 4 at milepost 41 in Polk City.

Authorities say two people were hospitalized after the crash. One has serious injuries.

There is no word on what led to the incident.

Only one westbound lane is closed as of this writing. All other lanes and the Polk Parkway exit ramp have reopened, the sheriff’s office said.