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UPDATE, 10:53 PM: Police Chief Robert White said in a press conference at Denver Health that one person is in custody who may or may not be connected with the murder. That individual had a gun on him or her at the time of the murder. Also, Mayor Michael Hancock said police officer killed was a single mother he knew personally.

UPDATE, 9:57 PM: Female police officer died from her injuries at Denver Health Center.

UPDATE, 9:41 PM: Police officer killed was mother of two, had been on the force for seven years. Officer was killed trying to break up fight around 8 p.m.

UPDATE, 9:36 PM: Witnesses are saying police are asking those in the neighborhood near 88th and Wadsworth to stay inside due to an ongoing search for another suspect.

UPDATE, 9:30 PM: Our Deborah Takahara is reporting, citing unnamed sources, that the female police officer has died.

UPDATE, 9:22 PM: Our Jon Bowman said police have up to two people in custody. Bowman said virtually every on-duty Denver officer is on the scene, and some who were off-duty. Bowman said they are all scouring the park for a weapon — that includes the back side of the Elephant Passage exhibit at the Denver Zoo.

UPDATE, 8:52 PM: Witnesses are reporting that the officer was female, may have been attending No Gang Violence Rally. Our Justin Joseph reports that the officer is in critical condition.

UPDATE, 8:45 PM: Witnesses are reporting they heard three shots fired. Hundreds of people were in the park at the time.

UPDATE, 8:45: PM Our Justin Joseph is reporting, citing unnamed sources, that the police officer was shot in the head.

UPDATE, 8:42 PM: A live stream from City Park. Currently about 20 police cars in the shot.

UPDATE, 8:35 PM: Paramedics were issuing CPR to injured police officer before he was taken away in an ambulance.

UPDATE, 8:30 PM: Police scanners are saying suspect is in custody.

DENVER — Shots have reportedly been fired in City Park Sunday night and a police officer may be wounded.

The Denver Police Department Public Information Office is still trying to confirm the details of the shooting, but a call went out for an ambulance around 8 p.m.

City Park was in the midst of hosting Jazz in the Park. There are no details if this incident stemmed from an altercation at the event.

We will provide more details to this story as they become available.