WYTHEVILLE, Va. - A tractor trailer wreck is causing congestion on Interstate 77 in Wythe County.

Wythe County Emergency Management officials say a tractor trailer hauling two Fed-Ex containers wrecked on Interstate 81 in Wytheville at mile marker 73.3.

The wreck happened earlier this morning at the I-81 / I-77 split.

Traffic on the northbound side of I-81 is down to one-lane, and traffic is backed up for at least seven miles.

According to first responders on scene, the wrecked cargo included paint, which spilled onto the roadway. Virginia HAZMAT officials are on their way to assist in the containment effort.

Officials say the public is not in danger,  but crews will be working to clean up the spilled paint throughout the day.

No one was hurt.