JERUSALEM, Israel -- Residents firing live ammunition to celebrate Mohammed Morsi's presidential win in Egypt killed one civilian and wounded six others in Gaza City on Sunday, according to Palestinian medical sources.

It's not the first time celebratory fire has killed or wounded civilians in Gaza. Store owners passed out candy and residents waved Egyptian flags as Egypt's national anthem streamed from loudspeakers.

Gaza-based Hamas chief Ismail Haniyeh called the Muslim Brotherhood candidate to congratulate him.

"This is a victory for all Arabs and Muslims and this is Allah's promise to his believers," Haniyeh said.

Hamas is an offshoot of the Muslim Brotherhood. Hamas spokesman Fawzi Barhoum praised Morsi's win as a "victory for Egypt and the revolution and the Arab people."

In Ramallah, Saeb Erekat, chief negotiator for the Fatah-affiliated Palestinian Authority, also congratulated Egypt's new president.

"We congratulate Dr. Mohammed Morsi, the Muslim Brotherhood candidate, on his win in the Egyptian presidential elections and his election as the president of Egypt," Erekat told Agence-France Presse.