Israelis and Palestinians woke up to a fourth day of violence on Sunday, with militants firing 17 rockets into Israel despite an unusually quiet night in Gaza just hours after a rocket killed an Israeli.

Tensions in and around the Gaza Strip have soared since Thursday when militants staged a series of bloody shooting attacks in the Negev desert, killing eight Israelis and prompting a wave of bloody tit-for-tat exchanges.

Israeli troops on Sunday arrested 120 Hamas members in the southern West Bank just hours after the faction's Gaza branch fired rockets into Israel, Palestinian security sources said.

Palestinian security sources said troops fanned out across the southern West Bank in an overnight operation which kicked off just hours after Hamas's armed wing in Gaza fired rockets into southern Israel, breaking a truce brokered in April.

Turkish Foreign Minister Ahmet Davutoglu warned Saturday that relations with Israel will further deteriorate without an apology over a deadly 2010 flotilla raid.

"There can be no normalization with Israel if Turkey's demands are not met," the Anatolia news agency quoted him as saying during a visit to South Africa.

World powers warned Saturday there is a "risk of escalation" after three days of fighting over Gaza that has already seen critical relations between Israel and Egypt plummet.

The European Union, Russia, the U.N. and the United States urged the region's key players to hit the brakes, as rockets fired from Gaza wounded three people -- ironically Palestinians in Israel -- and the Jewish state's air force responded with attacks on the coastal enclave.

Israel said on Saturday it had received no official notification from Egypt that it was recalling its ambassador to Tel Aviv after Egyptian state television reported that claim earlier in the day.

"At no time has Israel been officially notified of a recall of the Egyptian ambassador," foreign ministry spokesman Yigal Palmor said.

Egypt called on Israel Saturday to immediately halt punitive strikes on the Palestinian Gaza Strip after militants carried out deadly attacks in Israel.

"Egypt denounces the use of force against civilians in any circumstance and strongly advises Israel to immediately stop its military operations against Gaza," a foreign ministry statement said.

A monitoring force stationed in the Sinai in keeping with the 1979 peace treaty between Egypt and Israel said Israel violated it when its troops entered Egyptian territory and fired on security personnel, state news agency MENA reported on Saturday.

"The (Multinational Force and Observer) recorded two violations committed by Israel," the agency said, citing an MFO report.

Defense Minister Ehud Barak on Saturday said Israel "regrets" the deaths of Egyptian policemen killed on the border during an Israeli pursuit of militants who killed eight Israelis.

"Israel regrets the deaths of Egyptian policemen during the attacks on the Egyptian-Israeli border," Barak said about Thursday's assault by gunmen in the Eilat region of Israel.

The Arab League will hold emergency talks on Sunday to discuss the situation in the Gaza Strip after a series of Israeli air strikes on the enclave, the deputy leader of the group said.

"The Arab League will hold an emergency meeting on Sunday, at the request of Palestine, to examine the repercussions of the dangerous situation following Israel's continuous aggression on Gaza," Ahmed Ben Helli told Agence France Presse on Saturday.

Lebanese Forces leader Samir Geagea criticized the March 8 forces on Saturday for discrediting the case against four Hizbullah members in ex-Premier Rafik Hariri’s murder and hinted that the suspects had acted under orders from the party leadership.

The evidence provided by the Special Tribunal for Lebanon prosecutor in the indictment draws question marks on the role of Hizbullah, Syria and Iran in Hariri’s Feb. 2005 assassination, Geagea said at a press conference he held in Maarab.