A 19-year-old man has been arrested in connection with a fire in a flat at a tower block in Coatbridge.
Two people were treated by ambulance crews following the blaze at Calder Court in Whifflet which was reported at about 06:45.
The Scottish Fire and Rescue Service said crews in 11 fire engines and one height vehicle were working to extinguish the fire.
A spokesperson said: “Two casualties are in the care of the Scottish Ambulance Service and crews are currently still at the scene.”
Calder Street has been closed and the public has been asked to avoid the area.
Police said inquiries were ongoing.