A massive fire tore through SPS Technologies' Abington industrial complex late Monday. Here's what we know about the event.

An initial investigation led the fire marshal to believe a lithium-ion battery or other combustible material caused it.

The company, SPS Technologies, has a history of environmental and workplace violations, records show. Residents were sheltering in place and worried about the air quality.

Firefighters continued battling the blaze at SPS Technologies into Tuesday night as hundreds of people were advised to ...