GAZA CITY - At least seven Palestinians died in an explosion in Gaza City Thursday, in what officials said was an intentional act after a family quarrel. "Seven people including children died and around 30 others were injured in an explosion at a home" in Gaza City, a spokesman for the health ministry said. A police statement said a member of the Abu Assi family deliberately set a gas canister on fire during a family quarrel, leading to the explosion. It said police were investigating the circumstances of the incident. Eyewitnesses said the explosion caused serious damage to the two-storey building.