Ontario, CA: The Ontario Police Department was searching for a possible armed suspect after an unknown altercation broke out in the 1000 block of East Nocta Street in the city of Ontario on Sunday, Apr. 10, around 8:00 p.m.

Ontario PD had a house surrounded for 4 hours and neighbors in the area were evacuated from their residences for more than three hours.

The suspect was seen standing across the street and placed under arrest.