Children's play equipment was set on fire in Littlemoor in the latest arson attack in Weymouth - with a woman injured trying to put out the flames.
Equipment in a play park behind the Littlemoor Community Centre on Canberra Road was targeted at around 9:20pm on Monday February 25.
A Weymouth woman in her thirties sustained superficial burns while trying to put out the fire.
Weymouth Neighbourhood Inspector Les Fry said: "This was another malicious fire in the Littlemoor area. Fortunately, nobody was seriously injured.
"Dorset Police has been working hard with our partner agencies to ensure crime and anti-social behaviour is effectively tackled on the Littlemoor estate.
"We will not tolerate this sort of behaviour and I urge witnesses to this incident and anyone with information about those responsible to contact police as soon as possible."
There have been a spate of arson attacks on the Littlemoor estate in recent months. Police and local authorities have been granted dispersal powers to prevent anti-social behaviour taking place.
Weymouth and Portland District Commander Dave Graham of Dorset Fire and Rescue Service said: "Arson is extremely reckless and not only causes serious damage but ties up firefighters.
"All fire is extremely dangerous, and arson even more so as it can harm not only the individual setting the fire but also those community minded individuals who may try to extinguish it, plus of course our fire crews."
Witnesses or anyone with information should contact Dorset Police on 101, quoting incident number 25:450.