Gaza City ? Hamas gunmen on Friday burst into the home of a top Fatah official in Gaza and arrested him, relatives said. He was the most senior Fatah politician to be detained since Hamas forces overtook the territory in June.

Also Friday, three people were killed in an unexplained explosion at a funeral in Gaza City. Witnesses said a man carrying explosives in a jacket accidentally detonated them, while Hamas security said a member of the procession threw a pipe bomb.

Omar Al-Ghoul, arrested by Hamas for “illegal activities,” had been spending much of his time in the West Bank after Hamas violently seized control of Gaza in June. Al-Ghoul is an adviser to Palestinian Prime Minister Salam Fayyad, whose moderate West Bank government was formed after Hamas’ Gaza takeover.