The Ambassador Bridge reopened Saturday afternoon after an investigation caused traffic from the United States to Canada to be rerouted for several hours, Windsor police and the Canada Border Services Agency (CBSA) said.

In a post on X, formerly Twitter, Saturday morning, police said officers were "on scene at the Ambassador Bridge for an ongoing investigation."

Police did not provide any details about the investigation.

Incoming traffic to Canada was rerouted to the Detroit-Windsor Tunnel.

Around 3:15 p.m., police and the CBSA said the bridge had reopened.

"Operations have resumed after an incident at Ambassador Bridge. CBSA and Windsor Police Service are working on an ongoing investigation. There is no threat to public safety," CBSA said in a post on X.

Traffic into the United States was not affected.