CANNON BALL, N.D. (AP) — Another potential clash between Dakota Access oil pipeline protesters and law officers over a disputed bridge in southern North Dakota has eased.

The bridge on state Highway 1806 is near the protesters’ main camp. It’s been shut down for weeks because authorities say it might be unsafe due to earlier fires set by protesters. Protesters say the closed bridge blocks emergency services and their access to pipeline construction sites.

The two sides clashed overnight, with officers using tear gas, rubber bullets and water sprays against protesters they say assaulted officers with rocks and burning logs.

Protesters and police massed at the bridge again Monday morning. Protesters went back to the camp Monday afternoon at the request of Standing Rock Sioux elders, after reports of firearms in the crowd.