The property on Francis Street was set alight at around 1.40am on Wednesday, causing damage to the living room.Police and the Fire and Rescue Service attended and rescued a man and a woman as well as three children before bringing the blaze under control.Forensic officers conducted an examination of the scene.PSNI Ballymena Commander, Chief Inspector Stephen McCauley, called the attack "crude and dangerous"."Thankfully we are not dealing with fatalities or serious injury here. The attack was crude but also very dangerous. Police officers and the Fire Service arrived quickly on the scene to help the occupants of the house and take them to safety," he said."I am asking anyone who knows anything about this attack to assist the police investigation by calling the non-emergency number 101 or the independent charity Crimestoppers on 0800 555 111."Ballymena officers will also be in the area today, so please speak to one of them if you know anything that might assist the investigation."