ELLWOOD CITY — Firefighters are mopping up this morning after a fire at a metals recycling plant here.

Lawrence County emergency dispatchers said that a few firefighters remained at the scene about five hours after the blaze was first reported at the Inmetco plant in Ellwood City.

The fire was reported about 3:30 a.m. today and at least seven fire departments with 20 trucks responded.

Authorities believe the blaze might have started when some batteries being stored for recycling overheated.

The plant recycles products containing metals including nickel-cadmium batteries, chromium and other potentially hazardous materials.

No injuries have been reported due to the fire.