SAN ANTONIO - Two drivers involved in a car crash claimed they blacked out and couldn't remember what led up to the accident early Sunday morning.

The accident happened around 12:30 a.m. at Enrique M. Barrera Parkway near 36th Street on the city’s west side.

The two drivers in the accident who said they couldn't remember what happened were taken to University Hospital to get treated for their injuries. Police said they used their helicopter to look for a third person in another vehicle that was somehow involved.

Police have yet to determine if alcohol or drugs were involved. No arrests have been made.