Illegal fireworks have sparked at least three fires in Melbourne's north overnight following New Year's celebrations.
Officers discovered the first fire after they were called to the corner of Bindi Street in Glenroy about 4.30pm.
Upon arrival, officers found remnants of a firework at the scene.
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Witnesses in Kurunjang, in the city's west, reported the second fire in a paddock on Minns Road about 9pm.
Police have been told four people on motorbikes set off fireworks in the paddock, before fleeing the scene.
Firefighters contained the fire quickly.
Police said the last fire was reported by residents in Greenvale, who reportedly heard fireworks in the area shortly before a fire was discovered near Darmain Drive just after 10pm.
Police said the last fire was reported by residents in Greenvale, who heard fireworks in the area shortly before a fire was discovered near Darmain Drive just after 10pm.
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Detectives are investigating all three fires, which come just a week after a 19-year-old man was killed in an incident involving fireworks in Kalkallo.
Police have since urged people to refrain from using illegal fireworks, warning that they could easily lead to an "out-of-control fire" or the death or serious injury of another person.
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