Authorities released surveillance video Tuesday of the incident from June 19.
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It was around 12:42 a.m. when video shows the male suspect pouring a flammable liquid onto bushes next to a house on the 11000 block of Knights Road.
He then ignited the fire.
The video shows flames shooting from the bushes and then from the suspect himself.
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He runs off and is then seen rolling on the ground.
Police said the suspect got away in a car and was last seen east on Knights Road.
Anyone with information should call Northeast Detective Division at 215-686-3153/3154.