Authorities evacuated residents for more than 14 hours on Friday after a man refused to leave one of the units in an Oak Park condominium, leading to a standoff, the San Diego Police Department (SDPD) confirmed.

SDPD says the suspect may have been armed.

The incident begin at approximately 8:48 a.m. on the 1600 block of Pentecost Way at the Harbor Vista Condominiums. Officers responded to reports of an argument between the suspect and his mother.

[G] Standoff Underway in Oak Park, Suspect Refuses to Come Out of Home

Police say the suspect's mother fled the home but when officers arrived, the suspect refused to come out. Detectives worked with family members who were attempting to contact the suspect by cell phone, trying to convince him to safely surrender.

As of 11 p.m. the standoff was still underway. SDPD officers and SWAT remained on scene attemping to make contact with the suspect. Police fired two flash gang grenades but the suspect did not emerge from the unit.

"It is a nice neighborhood and maybe that is what the concern is," said neighbor Cheryl Graham. "We don't know what is going on, really. All we know, it is blocked off. All the police is here, you can't get into your house, you just have to wait until they say it's ok."

At approximately 11:15 p.m., the suspect finally surrendered.

Neighbors told NBC 7 that the suspect's mother was later transported to a hospital by ambulance. No other information was immediately available.