At least 16 people have died in a fire that broke out at a Moscow warehouse Saturday morning.

Firefighters tore down a wall of the four-floor facility, and found the victims. The warehouse is thought to belong to a local printing company. According to emergency officials, the victims were migrant workers from Kyrgystan.

Russia's Investigative Committee said in a statement that it is still probing the circumstances surrounding the incident. A criminal investigation has been launched to determine whether the blaze erupted due to arson or negligence.

At least 16 people have died in a fire that broke out at a Moscow warehouse Saturday morning.