The Latest: Source: Chicago police commander shot in head

Chicago Fire Department members put up a U.S. flag to fly above Harrison Street before the body of Chicago police Cmdr. Paul Bauer is transported to t

Chicago Fire Department members put up a U.S. flag to fly above Harrison Street before the body of Chicago police Cmdr. Paul Bauer is transported to t

In this Feb. 23, 2016 photo, then Chicago police Capt. Paul Bauer takes part in the arrest of a protester outside an Apple store on Magnificent Mile i

In this Feb. 23, 2016 photo, then Chicago police Capt. Paul Bauer takes part in the arrest of a protester outside an Apple store on Magnificent Mile i

In this Feb. 23, 2016 photo, then Chicago police Capt. Paul Bauer, left, takes part in the arrest of a protester outside an Apple store on Magnificent

In this Feb. 23, 2016 photo, then Chicago police Capt. Paul Bauer, left, takes part in the arrest of a protester outside an Apple store on Magnificent

Chicago police officers arrive for a news conference at Northwestern Memorial Hospital, regarding Cmdr. Paul Bauer, who was killed earlier in Chicago

Chicago police officers arrive for a news conference at Northwestern Memorial Hospital, regarding Cmdr. Paul Bauer, who was killed earlier in Chicago

A Chicago Police officer speaks a with a pedestrian at the scene where an off-duty officer was shot while assisting a tactical team at a state governm

A Chicago Police officer speaks a with a pedestrian at the scene where an off-duty officer was shot while assisting a tactical team at a state governm

Police guard the scene where an off-duty officer was shot while assisting a tactical team at a state government office building, Tuesday, Feb. 13, 201

Police guard the scene where an off-duty officer was shot while assisting a tactical team at a state government office building, Tuesday, Feb. 13, 201

Police guard the crime scene after an off-duty Chicago police officer was shot at the James R. Thompson Center, Feb. 13, 2018. (John J. Kim / Chicago

Police guard the crime scene after an off-duty Chicago police officer was shot at the James R. Thompson Center, Feb. 13, 2018. (John J. Kim / Chicago

CHICAGO (AP) — The Latest on the fatal shooting of a Chicago police commander (all times local):

9:10 a.m.

A Chicago police official says the suspect in the fatal shooting of a police commander was carrying a semi-automatic handgun with an extended clip of ammunition when he fatally shot the officer in the head.

The official spoke to The Associated Press on condition of anonymity because the person wasn't authorized to provide details about the weapon until the suspect is charged.

Cmdr. Paul Bauer was shot Tuesday spotting a man matching the radio description of an armed suspect.

The official says Bauer identified himself as a police officer and was trying to detain the suspect when they got into a physical fight and fell down a stairwell. The official says the suspect shot Bauer in the head multiple times.

Department spokesman Frank Giancamilli wouldn't comment on the weapon but says the suspect was also wearing a bulletproof vest under a coat.

Police expect the suspect to be charged either Wednesday or Thursday.

— Associated Press writer Don Babwin

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6:15 a.m.

The shooting death of a police commander near a state government office building gripped parts of downtown Chicago as emergency workers tried to save the department veteran at the scene and officers shackled the suspect.

Cmdr. Paul Bauer was shot multiple times Tuesday afternoon after he spotted a man matching the radio description of an armed suspect. Police Superintendent Eddie Johnson said Bauer "saw the offender and engaged in an armed physical confrontation." Officers had been chasing the man on foot.

The 53-year-old Bauer was pronounced dead at Northwestern Memorial Hospital. He had been on the Chicago police force 31 years.

Police spokesman Anthony Guglielmi (goo-lee-EHL'-mee) said on Twitter late Tuesday that Bauer was on-duty, not off-duty as previously reported.

Johnson said officers initially confronted the suspect because he was acting suspiciously. He didn't provide further details.

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This story has been corrected to indicate that the commander was on-duty, not off-duty, based on updated information from police.