SUMNER, Wash. (AP) — Police say two 19-year-old men responsible for shooting up Sumner City Hall have been arrested.

The News Tribune reports that the men were arrested Thursday night. Police say they aren't sure what prompted the shooting, which took place at about 1 a.m. Tuesday.

One shot went through the rear window of a parked patrol car. Three shots hit the back of City Hall and damaged a metal emergency exit door, brick and siding. No injuries were reported.

One of the men arrested pleaded guilty to second-degree assault in May for shooting his twin brother in the buttocks.