(WPXI) – A huge police presence is on the scene after one police officer was killed and another was injured after a shooting in McKeesport. Authorities say the officers were responding to a domestic situation involving an unstable man when he opened fire at the officers. Officials said the officers responded to Wilson Street for the incident involving a man going through a mental health crisis. According to officials, the suspect walked away from police when they tried talking with him. Police were told by a relative that the suspect was possibly carrying a gun. The suspect walked to the 1300 block of Grandview Avenue and was met by the officers where he turned and began firing. The officers returned fire when they were both hit and the suspect kept walking. The suspect turned the corner to the intersection of Versailles Avenue and Patterson Street and was met by a third officer. The two exchanged gunfire and the suspect was hit. Both officers shot were McKeesport police officers. One officer died at the hospital and the other was critically wounded and life flighted to a Pittsburgh trauma center where he is in stable condition.