There were believed to be around 150 workers at the factory in northwestern Turkey at the time of the explosion.
The South Korean defence ministry released surveillance footage of the explosion in Kaesong, which is located just over the border in North Korea.
Tunisian media are reporting that a suicide bomber on a motorcycle set off a blast near the U.S. Embassy in Tunis.
He was one of two people killed in a huge explosion at a chemical plant in north-east Spain on Tuesday.
It was blown up to make way for a Jeep factory.
Police recovered gas canisters and World War I ammunition from one of the flats.
The fire department said one person was still missing after the explosion.
Landmark Didcot cooling towers destroyed in controlled explosion
An explosion rocked an ammunition plant for the second time this week, injuring at least nine, according to national media reports.
Five Rosatom employees were killed and three injured in an explosion at a military testing site in northern Russia on Thursday, RIA news agency cited the state nuclear company as saying.
Russia said a fire triggered the explosions at a storage facility for gunpowder charges near the city of Achinsk in Siberia's Krasnoyarsk region.
A powerful explosion hit a five-storey building in Linköping, southern Sweden, on Friday morning, authorities said in a press release.
A memorial service was held on Tuesday (April 23) in the courtyard of one of the churches in Sri Lanka targeted by suicide bombers on Easter Sunday