At least eight people were killed in a bus crash on a Florida highway Tuesday morning, the Florida Highway Patrol said. According to the highway patrol, the bus collided with a pickup truck on State Road 40 in Marion County, which is located south of Gainesville and northwest of Orlando. The driver of the pickup truck was later arrested on drunken driving charges, authorities said.

Approximately 40 people, including the truck driver, were taken to area hospitals after the crash on the outskirts of Dunnellon, Florida, Highway Patrol Lt. Pat Riordan said during a news conference. Some of the injured were in very serious condition, Riordan said.

The crash involved a bus transporting about 53 farmworkers and a 2001 Ford Ranger truck, the highway patrol said in a statement to CBS News.

The retired school bus was traveling west on the highway and the pickup truck was going east when the truck moved toward the center line at around 6:35 a.m., Riordan said.

The bus and truck collided in “a sideswipe-type manner,” Riordan said. The collision sent the bus off the road and it went through a fence and hit a tree before it overturned.