A Tucson police officer chasing a man in connection with a theft and purse-snatching on the city's westside discovered that he lost his handgun during the pursuit.

The .40-caliber Glock, which fell out of the officer's holster, was not found Monday, and police are asking the public for help in finding it, said Sgt. Chris Widmer, a Tucson Police Department spokesman.

On Monday at about noon, an officer was flagged down at Safeway, 1551 W. Saint Mary's Road, regarding what was initially reported as a purse snatching, Widmer said.

A description of the suspect was broadcasted to other officers, and one officer located a man matching the description near St. Mary's and North Westmoreland Avenue, Widmer said.

The man ran as the officer approached. Officers chased the man through neighborhood yards, and climbed over several walls before capturing him in the 500 block of North Shawnee Avenue, said Widmer.

Police determined that Adrian Pride, 18, shoplifted an item from Safeway, and as he left the supermarket he grabbed the purse of a woman in front of the store, Widmer said. Pride was booked into the Pima County jail on suspicion of shoplifting and theft.

In November, an arrest warrant was issued for Pride in connection to a robbery at the Maui Smoke Shop at 1099 E. Broadway.

Police are asking the public for help in locating the handgun, which is a Glock 22 Gen4 with an affixed StreamLight tactical light. The serial number is RVS121, Widmer said.

He said Tuesday that even after an extensive search, including using a police dog, the gun had not been found.

Anyone with information is asked to call 911 or 88-CRIME.

Contact reporter Carmen Duarte at cduarte@azstarnet.com or 573-4104.