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DALLAS (CBSDFW.COM) — Today the Dallas Police Department is investigating a shooting involving one of their own.

Police were called to a house party near Fair Park early Sunday. When officers arrived, they attempted to talk to the suspect in the backyard; instead, the man ran into back into the house.

An officer pursued the suspect, but when he wouldn't stop, the officer tazed him. The suspect pulled a gun on the officer; he responded by shooting the alleged gunman.

Dallas PD responded to Reynolds Ave. house party disturbance w/3 people injured; officer fired weapon at suspect. pic.twitter.com/dqe8Oe8llS

— CBSDFW (@CBSDFW) June 14, 2015

The suspect fled the scene on foot. He was lost near the 32nd-block of Reynolds Avenue. No word yet on a motive behind the shooting or if the suspect was hit by the officer's gunfire.

The gunman remains at large today.

CBS 11 is told that a three people shot just before police arrived. They were transported to Baylor Medical Hostpital. Conditions remain unknown.

It is being reported that the event was a graduation party.

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