There were believed to be around 150 workers at the factory in northwestern Turkey at the time of the explosion.
Greek border police fired teargas toward migrants on Saturday as tension continued at a border crossing in the Evros region
Turkey has called for more help with migrants after 'opening the door' and causing increased movement on the Greek border. Meanwhile, NGOs slam the EU for what they see as a lack of humanitarian response.
Migrants waded across the Evros River in northwestern Turkey on Wednesday as they attempted to reach the land border with Greece.