Tacoma-Pierce County Crime Stoppers is offer a reward after a Lakewood police officer's personal car was spray painted and torched late Wednesday.

The car was parked at the officer's Spanaway home. It was painted with gang graffiti, then set on fire about 10:45 p.m., Lakewood police report. The driveway also was spray painted, according to police.

The officer's personal car is a loss.

The blaze caused heat damage to the officer's patrol car, which was parked next to his personal car. A rain gutter on the house also suffered heat damage.

The officer was inside the house at the time, police reported. No one was injured.

Investigators are looking into what might have motivated the attack. The officer recently had spray painted over gang graffiti in his neighborhood, Lakewood Assistant Police Chief Mike Zaro said. Or the officer's house could have been randomly targeted by someone who spotted a police car.

"With the graffiti left behind, we are definite confident it was gang related," Zaro said.

Before the attack, the officer twice had spotted a suspicious vehicle outside his home and went outside to investigate. Each time, the officer shined a flash light and the car took off. The car came back in 20 minutes intervals, Zaro said.

Twenty minutes after the officer spotted the car a second time, his personal car was on fire.

"They knew somebody was home and they knew it was a police officer's house," Zaro said. "It was pretty brazen."

The suspicious vehicle is described as a late 1980s maroon Buick or Cadillac.

Pierce County sheriff's detectives are investigating the arson. The regional gang officers also are assisting in the case, Zaro said.

Crime Stoppers is offering up to $1,000 for information leading to arrests and charges filed in the case. Tipsters may remain anonymous. Reach Crime Stoppers at 253-591-5959.