Hakikat Singh Panag, 59, his wife, Paramjit Kaur, 62, their daughter, Shalinder Kaur, 39, and his sister-in-law, Amarjit Kaur, 58, were all shot to death around 9:50 p.m (local time) on Sunday in their home in a suburban Ohio community. The motive behind the slayings remains unclear. External Affairs minister Sushma Swaraj has also taken cognisance of the incident.