The operator of a Michigan oil pipeline says it temporarily shut down Line 5 after protesters warned Enbridge that they planned to turn an emergency valve.
Video posted on social media showed someone with a hard hat and a wrench inside a fenced area Tuesday in Tuscola County, 90 miles north of Detroit.
A man outside the fence sang and played an electric guitar.
Enbridge spokesman Ryan Duffy says the incident was a “criminal activity” and not a lawful protest.
Gov. Gretchen Whitmer wants Line 5 shut down, saying it is a threat to the Great Lakes. Part of it crosses the Straits of Mackinac.