HOUSTON -

A Houston police officer avoided serious injury after a stray bullet fired during an attempted robbery struck him in the leg early Sunday morning.

Investigators said the officer was dealing with a traffic stop at around 3:45 a.m. on Airline Road near Brenda when the bullet grazed him in the calf.

"This is terrible, usually stuff like that don't [sic] happen around here," said a resident of the area.  "It got me by surprise to hear about this guy getting robbed here, and this stray bullet hitting this officer in the leg."

Investigators said a man was filling up jugs at a water stand when at least one man approached and attempted to rob him.  Police said a shot was fired during the robbery, but it missed the intended victim.

However, officers said that stray bullet traveled roughly three blocks on Airline Road before hitting the officer.

The officer was not seriously injured, and police said he was not transported to the hospital.

Surveillance video from a near-by business showed an altercation taking place in the parking lot where the shot was fired at roughly the same time police said the robbery occurred.

The footage showed a man being approached in the parking lot, and a short time later a pick-up truck speeding away with a man hanging out of the passenger side door. 

The robbery victim was unhurt.

"I'm glad you guys are reporting this and letting us know, so we can be aware of what's going on here," said the man.

Police are still trying to identify the gunman.