(WBIR) Two people are facing charges after they holed themselves up in an Oak Ridge apartment Monday night.

At about 7:40 p.m., Oak Ridge police responded to a disturbance among several people in the parking lot of an apartment building at 105 Wakefield Road. During the argument, witnesses told police that Abacuc Vazquez, 52, shot one round from a pistol before going into an apartment. Witnesses also said Vazquez had a second firearm with him inside the apartment, according to an Oak Ridge Police Department press release.

When police arrived, they established a perimeter around the apartment building and brought in a negotiator to talk with the suspect. About an hour later, Vazquez surrendered to officers. Inside the apartment, police found two semiautomatic pistols and arrested a second person, 28-year-old Megan Loy.

Officials charged Vazquez with six counts of aggravated assault and one count of reckless endangerment. Police charged Loy with tampering evidence.