(KXAN) -- Police in Austin, Texas, are searching for an armed man who pulled over and boarded a school bus while impersonating a police officer.

The incident began Tuesday during dismissal at Murchison Middle School. A driver reported that a man, described as white and wearing a red shirt and tan shorts, was taking photos of Murchison students as they used the crosswalk.

Later Tuesday afternoon, a man with a similar description posed as a law enforcement officer and pulled over a bus that had one Anderson High School student on board.

AISD Police Chief Eric Mendez says the man did not have emergency lights on his vehicle, described as a black Chevrolet Tahoe that looks like many commonly seen unmarked police vehicles. Instead, the man flashed his headlights at the bus to get the driver's attention.

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