A fire broke out after an explosion at a biscuit factory near the central Greek city of Trikala on Monday, killing three people and leaving another two missing, the fire brigade said.
Thick black smoke billowed into the sky as some 40 firefighters and 13 trucks tackled the blaze, with flames visible across the roof of the factory.
Factory owner Violanta S.A. said the cause was unclear, according to a statement cited by the Athens News Agency.
Eight of 13 people at the factory managed to escape, while three bodies were recovered and another two people were missing, fire officials told Reuters.
Investigators and disaster response units went to the scene.
Six people including a firefighter were treated at a local hospital, mainly for respiratory problems, but their lives were not at risk, the Health Minister Adonis Georgiadis told ERTnews radio.
"We only care about our people right now. We stand by them and their families and doing everything possible to support them," Violanta said in the statement.

Kenyan court charges 8 schoolgirls with fellow students' murder
At least 5 people killed in fire in Antwerp apartment block
Three people die in Mexico World Cup celebrations as fans crowd streets
US and Iran enter technical talks to secure peace deal, shipping restart
After Venezuela quakes, citizens lead rescues amid military theft accusations
Two dead after wildfire guts house in northern Greece
Afghanistan launches airstrikes on IS targets on border with Pakistan
Bangladesh warns of dengue surge as weather aids spread
