SAN LEANDRO -- Police have arrested a suspect in the brutal beating of a Safeway manager inside the grocery store near Victoria Park last month.

Charlie Johnson, 39, of Oakland, was arrested last week on suspicion of assault causing great bodily injury in connection with the Sept. 23 attack, said Lt. Randy Brandt. Johnson was expected to appear in court at the Hayward Hall of Justice on Tuesday to be arraigned on the felony charge.

Officers were called at 10:55 a.m. to the store at 555 Bancroft Ave. for a report of a battery involving seriously bodily injury, police said. They soon learned that a man had walked up to the manager inside the store, had had a brief conversation with him and, for unknown reasons, had punched the manager in the head, knocking him to the ground. The manager fell and suffered serious injuries, Brandt said.

San Leandro police have arrested an Oakland man suspected of punching a store manager at the Safeway on Bancroft Avenue last month.  (KGO Photo)
San Leandro police have arrested an Oakland man suspected of punching a store manager at the Safeway on Bancroft Avenue last month. (KGO Photo)

The suspect ran out the front door toward Bancroft Avenue and then in an unknown direction.

The manager was taken to a hospital for treatment and remained hospitalized Tuesday in serious condition, Brandt said.

After the attack, police released information about the attack that included a video surveillance tape. Thanks to tips from the public, officers said they were able to identify Johnson as the alleged attacker.

A judge issued a warrant for his arrest, and Oakland Police Department officers arrested Johnson on Friday at his home. He was taken to jail and booked. As of Tuesday, he remained in custody without bail at Santa Rita Jail, court records show.

Police have not specified a motive in the attack.

"This all would not have been possible without the assistance of a lot of people," Brandt said Tuesday. "This was a collaborative effort between media, citizens and neighboring police agencies. We successfully worked together to identify and arrest this violent suspect."

Anyone with information about the suspect or this case is asked to call police at 510-577-3230 or contact the Anonymous Tip Line at 510-577-3278.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.