Firefighters are tackling a major eight-pump blaze at a property on Christchurch Avenue, NW6, after reports of people inside the building.
The London Fire Brigade confirmed crews were called shortly after 1am to the address near Kilburn High Road. At least eight fire engines and specialist units are at the scene.
Persons reported inside
Emergency services received 999 calls indicating that people may still be inside the property. Firefighters wearing breathing apparatus are searching the building.
Police and London Ambulance Service crews are also in attendance. The scale of the response indicates a serious incident.
Road closures and traffic impact
Residents report road closures around Christchurch Avenue and Kilburn High Road as firefighters battle the flames. Locals are being urged to avoid the area.
Further updates, including casualty figures and cause of the fire, are expected later this morning.