(Updated at 3:05 p.m.) A worker is fighting for his life after his head was crushed by a trailer hitch in the Arna Valley View neighborhood, between Pentagon City and Shirlington.

The accident happened around 1:15 p.m, outside an apartment complex in the area of 26th and S. Troy Streets. Initial reports indicate that an older man was working under a white van with a trailer attached, trying to fix a tire, when something happened to cause the trailer hitch to come down on the man’s head, crushing it.

An Arlington County Fire Department technical rescue team worked for 30-45 minutes to safely lift up the van and free the victim, who’s said to be alive but in critical condition with a grievous head injury. He was transported via ambulance to George Washington University Hospital.

The victim’s son, who was working with his dad at the time of the accident, helped to flag down emergency responders. Unconfirmed reports suggest the men work for a pool services company.