Four members of a family,including three children aged between 12 and 17,were Friday found dead in their house here,police said. The father was found hanging from the ceiling at his residence while the three children were found dead on the bed, the police said. Prime facie,it is a case of suicide. But the cause can only be ascertained after post-mortem, police said. Magan Variya,45,and his three children Jayraj,17,Jaideep,15,and Hiral,12, took the extreme step allegedly because of loneliness and stress,a relative said. Magan8217;s wife died last year. Police said no suicide note was recovered from the house.