FIREBUGS torched a silver Ford Fiesta on Titherton Square in Penketh in the early hours of Saturday morning.
Police and firefighters arrived to find that vandals had set fire to the passenger side of the car before running from the scene.
A passer-by reported the blaze and said she spotted a man in a dark-coloured hat riding past on a mountain bike at the time of the explosion.
Police want to speak to him as he could be a vital witness and are asking him to contact them to assist with enquiries.
Anyone with information on the offence can contact police on 652222 or Crimestoppers in confidence on 0800 555 111.
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