Slick conditions caused crashes around central Kentucky on Sunday.

In Lexington, a driver lost control in a curve of Alumni Drive. He spun out and landed right in the path of an oncoming pickup truck that T-boned the passenger side, where his wife was sitting. Firefighters had to use the jaws of life to remove her. All three people involved, including the driver of the pickup truck, went to the hospital.

<14.55.19 CAPTAIN ROGER SMITH: "The roads are wet and it's a pretty sharp curve there, so he just lost control," says Captain Roger Smith of the Lexington Fire Department.

Minutes later, in Winchester, another crash sent three more people to the hospital. The victims included a mother and son. First responders said the injuries were non-life-threatening injuries.

Authorities on scene say the slick road was the only clear contributing factor to the crash.

Emergency workers warned drivers to be on the lookout for danger.

"We need to be aware of where we are on the road," says Captain Smith. "Most of the time in the beginning of a rainfall, you'll have the oil start coming out of the ground on the roads. That's just natural. It does that."

Captain Smith says oil in the asphalt commonly comes to the surface when rain begins to fall. The only thing that washes it away is more rain, often leaving even investigators confused as to what exactly caused a crash.

"It's hard to tell. It could have been an oil spot down there or just in general the wet roads."

Firefighters say the only sure bet is the best strategy for preventing collisions.

"Slow down and be careful."