New London — A woman was struck and killed by an Amtrak train Friday on the tracks near State Pier Road.

The woman was hit shortly before 10 a.m. just west of the railroad bridge that spans the Thames River between Groton and New London, an Amtrak spokesman said.

Police have not yet released the name of the deceased woman.

The westbound passenger train, which was traveling from Boston to Roanoke, Va., remains stopped on the tracks for several hours during an investigation. Amtrak reported the train started operating again at about 1 p.m.

There were no reported injuries to the 425 passengers aboard the train.

Jason Abrams, a senior public relations manager with Amtrak, said the person hit was trespassing on the tracks and Amtrak is working with local law enforcement on the investigation.

The initial response to the incident included a mix of state, local and Amtrak police, the New London Fire Department and emergency medical crews from Lawrence + Memorial Hospital.

New London Fire Chief Thomas Curcio said the department fielded a call shortly before 10 a.m. of a vehicle being struck by a train. Curcio said it wasn’t until a search for the location of the incident that it was determined a person had been struck.

The accident had led to some delays. Amtrak initially halted all train traffic going in and out of the New London area. Amtrak Northeast, on its Twitter feed, reported delays for trains in Old Saybrook, Providence and Kingston, R.I.

It is unclear why the woman was in the area of the train tracks. The Federal Railroad Administration lists trespassing along railroad rights-of-way as the leading cause of rail-related deaths in the U.S.

“These incidents can affect everyone involved - those who are injured or die and their families, our train crews, and our passengers,” Amtrak said in a statement. “They also serve as critical reminders about the importance of obeying the law and of exercising extreme caution around railroad tracks or crossings.”

g.smith@theday.com