Four members of a family including mother and three children died and father critically injured when roof of a house collapsed here in the wee hours of Thursday. According to details, roof of a stone and mud made dilapidated house located in Lower Pairout area of Abbottabad suddenly came down at the time residents were sleeping in the house. As a result a woman, her two sons and a daughter died on the spot while the owner of the house Ameen sustained serious wounds.