Firefighters believe a blaze at a Sunderland nursery school was started deliberately.
An outdoor shed at Pennywell Early Years Centre, on Portsmouth Road, was destroyed after a fire broke out early this morning.
The blaze spread to a second shed, which also suffered fire damage.
A spokesman for Tyne and Wear Fire and Rescue Service said: "At 2.55am this morning, eight firefighters from community fire station in North Moor attended Portsmouth Road in Sunderland.
"This was a single-storey building used as a nursery.
"The fire was in an outdoor shed, which was 100% severely damaged by fire.
"The fire spread to a second shed, which sustained 20% moderate fire damage.
"The fire was extinguished using one hose reel. Two breathing apparatus' were also used.
"The cause is suspected malicious ignition."