Seoul : Five people were killed on Monday while two others were injured following an explosion at a factory in South Korea's Hanwha Aerospace facility in

SEOUL, June 1 (UPI) -- Five workers were killed and two others injured Monday after an explosion and fire at a Hanwha Aerospace defense facility in the central South Korean city of Daejeon, officials said.

The explosion is suspected to have occurred as workers at the site were conducting explosive-related cleaning work. The company facility, which develops large propulsion engines and tactical surface-to-surface weapon systems.