Officials say schools are closed and residents have been ordered to shelter-in-place after a large fire broke out at SPS Technologies in Jenkintown.

Residents near a Pennsylvania aerospace manufacturing plant that caught fire Monday night have been asked to voluntarily evacuate as officials worry about air quality conditions. The blaze broke

The fire broke out at around 9:30 p.m. Monday, and witnesses said there was an explosion and that flames could be seen inside the warehouse, the Abington Township Police Department said in a statement on social media.

Residents and businesses in the immediate area of SPS Technologies were asked to evacuate Tuesday afternoon due to concerns over air quality in the wake of a massive industrial fire that began Monday night at the facility,