>> Watch news video.

A Milwaukee firefighter was shot overnight Sunday while he and other firefighters tended to a patient who was having trouble breathing.

The 46-year-old firefighter, whose name was not released, suffered a graze wound to the right side of his head and has since been treated and released from the hospital, according to a fire department news release issued Monday.

The firefighters were called just after midnight to the area of N. 40th St. and W. Lisbon Ave. to assist a patient.

They assessed and treated the patient and were in the process of transferring the patient to Curtis Ambulance when shots were fired from a nearby alley in the direction of the first responders, according to the news release. Several rounds also hit the ambulance.

But Police Chief Edward Flynn said it does not appear that the firefighter had been targeted.

Flynn said detectives had recovered shell casings near the scene that appear relevant to the investigation.

A similar incident happened this past May in Milwaukee when a Paratech ambulance was struck by a bullet inches from the driver when responding to a 911 call.  This was the first incident of its kind in 43 years of business at Paratech Ambulance.  >> Click for video story.