Vermont State Police are working with the Oxford County Sheriff’s Office in Maine to investigate a threat made against a restaurant.

Authorities said a bomb threat was made against Zenbarn, a restaurant in Waterbury, Vermont, on Friday night.

Police said the venue was hosting a Vermont Democratic Party fundraiser, but most people had left by the time the call was received.

Vermont State Police say the call was traced to a landline in Maine.

Police in both states are working to identify the caller.