The southbound lane of Interstate 95 at Exit 167 in Etna has been shut down as state police deal with four rollovers, one a tractor-trailer carrying potatoes.

Maine State Police said drivers must get off the highway at 167 in Etna and take Route 2 to Newport, where drivers can pick up the highway again.

Only the southbound lane is closed. Northbound traffic has not been affected.

It is unclear when the highway will reopen.