Interstate 66 is blocked at I-495 following an accident involving a fuel spill, according to Virginia transportation officials.

The Virginia Department of Transportation said that emergency crews are on the scene, and hazardous material crews are en route.

There is no access to I-66 west from the Beltway, and there are delays in both directions on 495.

There is no current estimate for when the interstate will reopen, officials said.

1:28 p.m. Update: Lanes have reopened, and Beltway drivers can now access I-66 westbound. However, delays are still present both on 495 and I-66.