The fire in which Indian-origin Rajiv Warikoo, 51, his wife Shilpa Kotha, 47, and their daughter Mahek Warikoo, 16, were killed in Canada, was not accidental, police said. Their home erupted in flames around 1:30 pm on March 7. "It was an explosion. It sounded like a loud pop," neighbour Nicholas Qhush said.