A shelter in place remains in effect Friday morning following a train derailment, town officials said.

The measure remains a precaution, and no leak has been detected, officials said during a press conference held Friday morning.

Mansfield Fire Chief John Roache said crews are still on scene after a train derailed Thursday morning near Route 32.

Roache said four propane tank cars went into the Willimantic River. None of the tanks are leaking, he said.

As an added safety measure overnight, crews placed several booms downriver to help mitigate any potential spill, Roache said.

The rail company brought in heavy equipment overnight, including cranes and excavators, he said.

Roache said people should avoid the area due to increased traffic from cleanup operations.

Officials said 13 of the train’s 43 cars became detached, and 10 of those cars derailed near Route 32.

No one was injured, according to officials.