Fairfield police are investigating a suspicious vehicle found in the area of Mill Plain Road and Interstate 95 Tuesday.
Part of Sturges Road near Mill Plain Road remains closed due to the investigation.
Earlier, part of Mill Plain Road was closed between Post Road and Sturges Road, and the entrance and exit ramps to I-95 at exit 21 were closed, but have since reopened.
Police said there is no threat to the public, but warned to expect significant delays in the area.
No other information was immediately available.