LAHORE: An explosion occurred in Gulshan-i-Iqbal Park of Iqbal Town on Sunday evening, killing at least 63 people and injuring over a 306, police said.Iqbal Town Superintendent of Police Dr Muhammad Iqbal said the explosion was a suicide attack.Eye witnesses said there were pools of blood and scattered body parts in the park, where a large number of families, especially women and children, were present on a Sunday evening.Rescue officials and police rushed to the explosion site in a renowned residential area, where at least 20 people are reportedly injured.