Two people were taken to the Princess Elizabeth Hospital after a house fire in St Sampsons.
It broke out at a property in Ronde Cheminee in the early hours of this morning.
St John Ambulance says two people were assessed and taken to the Emergency Department to be treated for potential smoke inhalation.
Police and the Guernsey Fire and Rescue Service were called out at 00:43, taking several hours to bring the blaze under control.

Flu cases in Guernsey 'creeping up'
CI ferry operators to work together to improve inter-islands travel
Talks ongoing to enable Guernsey ferries to access St Malo
"No shortage" of flu jabs for Guernsey vaccination programme
Both winning CI Christmas Lottery Tickets sold in Jersey
Guernsey women's murder trial "unlikely ever to resume"
Guernsey actor to reprise Doctor Who role for Boxing Day Dip
Aurigny to fly between Guernsey and Jersey next year