Another 72-hour cease-fire took effect Monday at midnight, once again putting a moratorium on fighting between Hamas and Israel. 

The Israeli delegation arrived in Cairo Monday to continue talks in an effort to broker a lasting truce with Hamas and other extremist Palestinian groups. Israel previously said that it would not engage in negotiations if Hamas continued rocket attacks, Israeli paper Haaretz reported. 

Azzam Ahmed, the head of the Palestinian delegation, said Sunday that the delegation will leave Cairo if Israel does not agree to return to Egyptian-mediated talks without preconditions. 

The first 72-hour cease-fire was violated late last week when Hamas fired rockets into Israel after talks in Cairo sputtered. Israel promptly responded by pulling the Israeli delegation from Cairo and launching retaliatory strikes. 

Israel struck more than 25 Hamas targets in Gaza Sunday, and around 60 on Saturday. Rocket fire continued to hammer Israeli communities in southern Israel, including some areas in Tel Aviv, and continued minutes before the cease-fire began. 

Early Monday, a Palestinian gunman was killed in a standoff with Israeli troops near his home in the West Bank. The gunman began shooting at undercover border police that arrived at his house to arrest him. The officers fired missiles at the house in response. 

Israel Air Force troops also killed Faraj Abu-Rabia, a Hamas operative who worked to oversee Hamas tunnels, which Hamas used to infiltrate Israel. Israel said that all of Hamas' tunnels were destroyed in the ground offensive in Gaza. 

Israeli Economy Minister Naftali Bennett said Sunday that he opposes the cease-fire with Hamas. 

"The cease-fire is a green light for Hamas to start shooting at us in 72 hours," sources close to Bennett said. "You don't need to negotiate with a terror organization like Hamas. You need to treat Hamas like an organization firing rockets at us." 

Also, on Monday morning, a Turkish aid group said it would send ships to Gaza, in direct violation of the Israeli blockade of the Gaza Strip. Four years ago, a Turkish ship bound for Palestinian territory was seized by Israeli commandos, and 10 people aboard the ship were killed. 

The incident severed ties between Turkey and Israel, and the two countries have not had diplomatic relations since. A coalition of pro-Palestinian activists from 12 different countries met in Istanbul over the weekend and decided to launch a convoy in Gaza. 

Earlier Monday, a senior official from the United Nations said fighting will likely resume from Gaza unless Israel lifts its economic blockade of the region. 

"The blockade must be lifted not only to get material into Gaza in order to rebuild it but to allow Gaza to do what it was doing very well just 10 years ago, to trade with the outside world," James Rawley, U.N. resident and humanitarian coordinator for the Palestinian territories, told AFP, according to Haaretz. 

"Gaza has a tremendous potential. People are very entrepreneurial, they're well educated, they have markets abroad, in Israel and the West Bank. The blockade has to be lifted in order that Gaza can thrive," he said. 

Four wounded Palestinians were also taken to the Turkish capital early Monday for medical treatment. The move to allow Palestinians into the country was announced by President-elect Tayyip Erdogan. 

"Our wounded from Gaza have started to come," Foreign Minister Ahmet Davutoglu told reporters at the Ankara airport.

"In the first stage we plan to bring to Turkey, and treat, maybe 200 patients," Davutoglu said. He added that more patients will be brought into the country in groups of 40. 

Erdogan announced the plan to evacuate thousands of injured Palestinians after he claimed victory in Turkey's presidential election early Monday.