Two men showed up at a hospital in McKeesport early Saturday morning after they were both shot in the head.

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According to police, the men drove themselves to a hospital around 3:42 a.m., then were transported to local trauma hospitals.

The driver of the vehicle, a 33-year-old man, has non-life-threatening injuries, according to police. The passenger, a 22-year-old man, was last listed in critical condition.

Police said it's unclear where the shooting occurred, but there were reports of shots fired on the Rankin Bridge around 3:35 a.m. Broken window glass and ballistic evidence consistent with a shooting were found in that area.

The driver of the vehicle was interviewed but was not cooperative with officers, police said.