Update 4:14pm: According to county radio reports, the fire inside the building was extinguished at about 3:45 p.m., but a large cloud of yellow smoke remains in the area. The composition of the cloud is not clear and firefighters have been asked to keep breathing gear on while at the scene.
Initial story below.
A second alarm was sounded around 3 p.m. today to Lion Scientific, a business located at 20 Clipper Road in West Conshohocken. Philly Fire News reports a third unit being called to the scene, as well. Local fire and police units reported to the scene where a 100-by-50-foot, one-story building is showing "heavy fire" and "several explosions at this time" according to Breaking News Network (BNN) reports.
Fire teams say that the fire is nearly under control at this time, but report a heavy, yellow cloud of smoke in the area.
A Patch reporter is on the scene, and more news will be posted as available.