Update at 4:20 p.m. — It appears that eastbound I-66 has reopened at the accident scene.
An overturned vehicle is tying up traffic on westbound eastbound I-66.
A car flipped on its roof in the eastbound lanes near Great Falls Street just before 2:30 this afternoon. Initial reports suggest paramedics are evaluating at least one patient. Firefighters are working to reach another person who’s trapped in the vehicle.
Eastbound traffic is at a standstill just past the Beltway.