Portland police arrested a 15-year-old boy suspected of trying to steal a cellphone and displaying a loaded semiautomatic handgun at a person sitting in Southeast Portland’s Harrison Park around noon Saturday. After a struggle, the suspect ran off.

The victim was not injured, police said.

Officers searched the area and found the suspect a half-mile away near Southeast Clinton Street and Southeast 84th Avenue. He was booked into the Multnomah County Juvenile Detention Center on charges of first-degree robbery, unlawful possession of a firearm and menacing.

Officers also found a loaded semiautomatic handgun they believe was used in the attempted robbery.

--Janet Eastman | 503-294-4072

jeastman@oregonian.com