Law enforcement agencies in Maine are investigating a fatal shooting that involved federal agents in Biddeford on Monday morning, according to the governor’s office and other elected officials.

Details are unclear, and federal officials have yet to comment. But eyewitness reports and an elected official indicated that an Immigration and Customs Enforcement agent shot someone in a vehicle, killing the person.

Social media video showed agents surrounding a still body at an intersection in Biddeford, next to a car with bullet holes in the windshield, and local police officers arriving at the scene.

Gov. Janet Mills said in a statement that the Maine State Police and other agencies were consulting with federal officials “to determine the facts of what occurred this morning.”

Representative Chellie Pingree, a Democrat, said in a phone interview on Monday that “we have gotten reports that ICE officers shot through a car window, and the individual in the car was killed.”

The Biddeford Police Department said in a statement that officers had answered a call for an incident that involved ICE agents. The department said its only involvement was providing security at the scene, and that further information would have to come from ICE.

Ms. Pingree said that she was on her way to Biddeford, a coastal town about 20 miles south of Portland, in search of more information. “We don’t know if this was a routine stop,” she added, “or if it was someone they were pursuing.”

In Maine, a statewide surge in federal immigration enforcement began in January, part of a series of similar federal campaigns in Democrat-led cities across the country.

This is a developing story. Check back for updates.

Allison McCann contributed reporting.