oilspilledstatecapitalBISMARCK, N.D. (AP) — The Latest on protesters trying to halt construction of the Dakota Access oil pipeline in North Dakota (all times local):

Tuesday 12:10 p.m.

Someone has splashed oil on North Dakota’s Capitol in Bismarck.

The North Dakota Highway Patrol, which provides security at the building, says security footage caught two people dressed in black carrying the oil at the west entrance about 9:30 p.m. Monday. A small amount of oil was splashed on a wall and nearby sidewalk.

A sign placed at the entrance said, “You can’t drink oil.”

Troopers say no arrests have been made. The entrance was reopened Tuesday morning after it had been cleaned.

Protesters have been demonstrating for months against the Dakota Access oil pipeline being built in the southern part of the state. Patrol Lt. Tom Iverson says the sign suggests the vandalism is related to the protest.