HARRIS COUNTY, Texas – Authorities are investigating what caused a sheriff's deputy to crash into the back of another driver in northern Harris County early Friday.

The crash happened before 4 a.m. on Rankin Road at Rankin Circle East, not far from Imperial Valley Drive.

The deputy apparently hit the back of a blue sedan as that driver slowed down to turn into a parking lot. There were no reports of serious injuries.

As of 4:30 a.m. Rankin Road was shut down in both directions, but the scene has since cleared.

The sheriff's office says the deputy was not responding to a call at the time.