Three children who were playing outside their house in West Bengals Bankura have been killed after wall of a mud house collapsed on them on Saturday morning.According to the witnesses, incident happened around 5:30 am in the morning. The three children were of three to seven years. Notably, the district has been receiving heavy rainfall since past few days, which may have led to the incident.Meanwhile, one of the police officials said that the children were immediately rushed to the district hospital but were declared dead by the doctors before admission.One of the witnesses informed, “I heard a loud thud and saw the wall had collapsed. The children were playing there moments ago. I sprinted there only to find that they were all buried under the debris.”