A suspect is at large after shooting at an occupied Dallas police car Thursday morning, hitting the passenger-side door and window, police reported.

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The shooting occurred about 2:10 a.m. as officers in a marked squad car drove east on Interstate 30 near the I-45 interchange in downtown Dallas.

Real lives are affected by this false narrative of a War on the Police! Some coward shot at our officers ! pic.twitter.com/oz4yyuLf75 — Michael Mata (@mmata7313) February 8, 2018

At a press conference Thursday afternoon, Assistant Police Chief David Pughes said that the officers heard "a couple of loud bumps," one being a bullet striking the side passenger door and the second a bullet penetrating the passenger side window and then the windshield.

The officer in the passenger seat was injured by flying glass and taken to the hospital by his partner. The injuries were determined to be minor.

Officers responded to the scene of the shooting and found four 9-millimeter shell casings, Pughes said, but did not find the suspect.

Investigators believe the shots may have been fired from the service road onto the freeway, possibly from a slowly moving vehicle, and are soliciting information from anyone who saw anything suspicious in the area.

"The key to these types of situations is that somebody drove by last night and saw something that didn't seem odd to them at the time," Pughes said. "But looking back on what happened, they'll put it together and say, 'This is something of value.'"