Five members of a family, including two women, were found dead in an under-construction house in Haryana's Jhajjar city on Tuesday, police said.The five were migrant labourers from Madhya Pradesh, who came to work in an under-construction house in sector 6 of the city.Police found that they all were attacked with a sharp-edged weapon and injuries were inflicted on their heads.As per preliminary investigations, police suspects a planned murder in the case.Soon after receiving information about the incident, a police team rushed to the spot and sent the bodies for postmortem.A murder case has been registered and further investigation is underway.