Jersey Police are looking for two people who allegedly threw glass bottles that were on fire in the St Saviour's Parish Hall car park on Monday 2 May.
One hit the floor and the other hit a parish vehicle just after 9pm.
Both burnt out and no one was harmed or injured.
Officers say the two suspects ran back up St Saviour's Hill towards Five Oaks.
Cars were driving past at the time and officers want to speak to those drivers.
Anyone with information is asked to call the police on 612612 or Crimestoppers anonymously on 0800 555 111.

Cheaper parcel prices for 2026
Draft Food Law lodged to protect people with allergies
WATCH: Last Blue Islands plane leaves Jersey
Jersey pupils secure places in STEM Racing UK National Finals
Plémont puffins get a Christmas makeover
New café bar and kitchen coming to Jersey Airport
Fresh process to choose Havre des Pas Lido operator
Jersey Water has 100% compliance in all water quality standards, including PFAS