Residents in Greneva could hear the explosion over 20 kilometres away, the local governor said.
Three factory workers have been killed after a powerful explosion at a commercial dynamite factory in northern Greece.
The blast occurred in a remote area outside the northern city of Grevena on Monday, 420 kilometres northwest of Athens.
Residents of the town heard the explosion, regional governor Giorgos Kasapidis said.
The company that owns the factory said on Monday that the three workers, who had been declared missing for hours, were dead. One other factory worker was hospitalised with light injuries.
“Explosives experts and rescue specialists are on the way to secure the site and make sure there are no secondary consequences from the initial explosion and to take other actions necessary while investigating the causes of the accident,” Kasapidis told state-run television.
The cause of the blast is under investigation.