ST. PETERSBURG — Two men were arrested Friday afternoon after the Pinellas County Sheriff's Office said they struck a 64-year-old man with a rock last month, leaving him hospitalized with a life-threatening injury.

Jamari Devonte-Shadi Brown, 19, faces charges of aggravated assault and aggravated battery with a deadly weapon. Dayquan Brown, 20, faces a charge of aggravated assault.

The Sheriff's Office gave this rundown of the incident:

On June 22, at about 2:30 p.m., a resident of an apartment complex at 2702 Grove Park Ave. yelled at the two men for trespassing after he spotted them cutting through the parking lot. The pair left but returned with rocks and a shovel, deputies said, and threatened the man. He retreated into his apartment and called 911.

Then deputies said another resident, Peter Hoffstetter, stepped outside his apartment at 2664 Grove Park Ave. and confronted the duo. An argument ensued, deputies said, and Devonte-Shadi Brown threw a rock and struck Hoffstetter in the head. He fell to the ground, and the two men fled.

Deputies found Hoffstetter conscious on the ground. He told them he had tripped over a parking space curb and refused medical attention. However, deputies said he never told them he had been hit in the head with a rock.

His condition worsened hours later, deputies said. He was taken to Bay Pines VA Healthcare System and then flown to Bayfront Health St. Petersburg for emergency treatment. The Sheriff's Office said his head injury is considered life-threatening.

Deputies used surveillance video to identify the two men and arrested them Friday. Both admitted to the allegations, according to the Sheriff's Office, and were booked into the Pinellas County jail. Devonte-Shadi Brown was being held in lieu of $15,000 bail and Brown on $5,000 bail.