The attack happened at Killyglen Road in Larne around 5 pm Sunday afternoon.
The police say a 32-year-old and a 23-year-old are being questioned on suspicion of arson with intent to endanger life.
They also said a 34-year-old man was arrested on suspicion of disorderly behaviour and assault on police.
Following Sunday’s attack, two men – aged 24 and 34 – were also arrested on suspicion of arson with intent to endanger life.
The attack followed a series of arson attacks in Larne over recent days.
It is believed the attacks are linked to an ongoing criminal feud in the seaport town.