A United States Postal Service vehicle was hit on SH 92, in Grady County, northeast of Chickasha.
The rural postal service vehicle was turning left when another car came up over the hill and rear ended the vehicle, Trooper Kerry Massie, with the Oklahoma Highway Patrol, said.
There were two minor injuries, Massie said. One person was transported to Grady Memorial Hospital and another person took their personal vehicle to the hospital, Massie said.
Traffic was slowed or stopped for about an hour after the accident occurred around 9:57 a.m. on Friday.