It is the second arson attack in Co Antrim in the space of 24 hours.
Last night’s attack happened in Ballyclare.
The previous day a family home was attacked with a petrol bomb in Ballymena’s Alfred Street.
On last night’s attack in Ballyclare, Inspector Colin Ash said: “At around 9.30pm on Friday 21 April, police received a report of a van on fire in the Douglas Terrace area.
“It’s believed a window on the vehicle was smashed and a petrol bomb thrown inside causing damage to the interior.
“A male, described as being around 5’ 8” tall and wearing a dark coloured hoody and jeans, was spotted fleeing the area on foot, through the playpark, in the direction of Doagh.
“We are keen to hear from anyone who was in the area last night or who may be able to assist the police investigation in any way.
“Officers can be contacted by calling 101, quoting reference number 1317 21/04/17.”
Information can also be given anonymously to the Crimestoppers charity on 0800 555 111.