A Colorado pastor’s mother and a suspect are dead after both were shot outside a suburban Denver church.

Authorities say the pastor’s mother was shot when she went outside the New Destiny Christian Center in Aurora just as services were ending Sunday. They say an off-duty officer was in the congregation and shot a suspect.

Police say the shooting happened after there was an argument between people in two vehicles in the parking lot outside the church.

Pastor De Lono Straham said that his mother passed away after the shooting Sunday evening. Police say the suspect who was shot also died.