The crash happened in the 11500 block of Westheimer near Royal Oaks at about 2:30 a.m.
A police sport-utility vehicle was stopped at a light on westbound Westheimer when a pickup from behind approached the intersection at a high rate of speed.
The pickup swerved to avoid a crash but struck another car stopped at the intersection and then hit the police SUV.
Two officers in the SUV were treated at the scene. A driver in the other car was not hurt.
The pickup driver was not hurt but is being investigated for DUI.
The incident caused a traffic blockage in both directions of Westheimer. It was since reopened to motorists.
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