TAMPA, Fla. (WFLA) — The Polk County Sheriff’s Office is investigating a pair of crashes that occurred just south of Bartow Friday morning.

The sheriff’s office said a pedestrian was fatally struck by a vehicle on 4151 U.S. Highway 17 in Polk County. Their investigation is affecting traffic in the southbound lanes.

Three more vehicles were involved in a crash south of that incident, in the northbound lanes of U.S. 17 in the Homeland area, the agency said.

A sheriff’s office spokesman said there was fog in the area, and it appears to be a coincidence that the crashes were so close.