MERRILLVILLE — An Indiana State Police trooper was awakened by what sounded like gunfire and went outside to discover damage to his police car, personal car and home, officials said.

The trooper heard the gunfire about 4:20 a.m. Wednesday and looked outside, but saw nothing. He found the damage later Wednesday morning, after going outside, police said.

Bullet holes were located on the front passenger side of both his police car — a 2014 Dodge Charger — and his personal car — a 2005 Chevrolet Aztec. The bullet that struck his police car ricocheted and hit his home on Harrison Street.

A neighbor told police he was letting his dog out about 4:20 a.m. when he heard multiple shots fired. Someone also call 911 to report the gunfire, police said.

It appears the damage was a result of a drive-by shooting involving a semi-automatic weapon, police said. A bullet was recovered.

No injuries were reported.

Anyone with information is asked to call Detective Brian McCall at 219-696-6242. Callers may remain anonymous.