Two boys are fighting for their lives in hospital after a fire at their home in Basildon.
Crews were called to the property in Beambridge yesterday.
A 13-year-old boy was flown by air ambulance to the Royal London Hospital while a ten-year-old boy was taken to Basildon Hospital by ambulance.
Both boys are described as being in life-threatening conditions.
The fire was extinguished by 4.30pm.
The cause of the fire is not yet known and enquiries at the scene are continuing.
Anyone with information is asked to contact police on 101.