A construction worker suffered critical injures after falling from the roof of a new home under construction in Arlington’s Riverwood neighborhood.

The incident happened just before 11:00 a.m., on the 3700 block of 27th Street N. The man, 34 years old and from Woodbridge, was working installing trusses on the roof of the new home when he lost his balance and fell three stories (30-35 feet) onto a patch of dirt, according to police.

The victim was semi-conscious when he was loaded into an ambulance and rushed to George Washington University hospital. His injuries are described as “critical.”

The family of the victim has been notified, said Arlington County Police spokesman Dustin Sternbeck. State occupational safety officials were also notified. Police remained on scene to help investigate the accident.