BOSTON (AP) — Authorities are investigating after an underground steam pipe sprayed an unknown substance across a downtown Boston intersection.

Boston fire officials say hazmat crews responded to the area of 99 Summer Street around 5:30 a.m. Saturday after a steam leak left unknown debris in the area.

Photos of the scene show an ashy substance settled on a car and the nearby intersection.

City officials say the pipe is operated by Veolia, a water, waste and energy company. A representative did not immediately provide information.

Boston Fire Department spokesman Brian Alkins told The Boston Globe that officials are concerned the substance may be asbestos.

A portion of Summer Street has been shut down as authorities investigate. Fire officials say Veolia workers are testing the debris while hazmat technicians monitor the scene.

(Copyright (c) 2024 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

Join our Newsletter for the latest news right to your inbox