A teepee at a school for students with disabilities has been destroyed after it was set alight, causing $12,000 worth of damage.
Police are searching for a number of youths who are believed to have entered the school grounds at the Nepean School in Seaford and set fire to the teepee, which was located in the playground.
Emergency services were called to put out the fire at the Klauer Street school about 10pm on September 3.
Images of a number of youths have been released, as well as CCTV footage from the playground.
The footage appears to show four teenagers, all wearing hoodies, entering the playground and shining a torch. Minutes later, fire can be seen taking hold in the teepee before the whole structure goes up in flames.
The teepee was valued at $12,000 and was completely destroyed. No other buildings were damaged.
It comes several years after the teepee, which is used as a "gathering place" for the students, was stolen and then returned to the police station anonymously.
It went missing in 2016, and a year later turned up on the steps of the Healesville police station with a note instructing it be returned to the Seaford school.
It was heavily damaged, and expensive to repair, but it was erected back in the playground about six months ago.
Principal Carolyn Gurrier-Jones said the fire was "really disappointing" for the school community.
"Some of the students have said, 'why would people pick on kids like us?' Those are the sentiments. The community feels sad because it was such a central part of the playground and it also impacts the kids capacity to feel safe going forward," she said.
"The kids have been loving it, it was central to so many things, whether that was playing, mindfulness practice, relaxation ... it was lovely to have a central space."
She said the school was considering whether it needed to install extra security measures.
The government specialist school caters for students aged between 5-18 years who have a physical disability or complex health impairment.
Niki Harrison, whose daughter Abby has attended the school for five years, said the incident was terrible for the kids so soon after the teepee had been returned.
"It is a wonderful school and I can't believe that people would do this," she said.
"Two years ago the teepee was stolen and the children finally had it back up and then a month later it's burnt to the ground. Just awful. These kids should be caught and taught a valuable lesson."
Frankston Crime Investigation Unit detectives are investigating, and are keen to speak to anyone who may have seen any suspicious activity in the area.
Anyone with information about the incident is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au