Firefighters battled a large fire at a business in Stratford on Monday morning.
Video from the scene showed heavy smoke and flames coming from the building at 10 Research Drive around 6:45 a.m.
A few workers were inside Soundsphere and were mixing chemicals when the fire broke out, according to the fire chief. They do not yet know how or where the fire started, he said.
The company assembles speakers at the location.
No one was injured.
