Given the task definition and input, reply with output. In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

Hamas called on the United Nations on Friday to put an end to the "crime of the recent attacks on Gaza," referring to the stepped up Israeli air strikes on the Strip which have come in the wake of increased rocket fire, the pan-Arab daily Al-Quds Al-Arabi reported. 
  
 The report, which was carried by Israeli media, also said that Taher al-Nunu, a spokesman for the Hamas regime, called on the Arab League to work urgently to stop "recent Israeli aggression." 
  
 An area bombed by the Israel Air Force in Rafah, Gaza Strip on Thursday, March 24, 2011. AP 
  
 Israel must be prevented from "exploiting the instability in the region and world to carry out massacres against the Palestinian people," Taher said. 
  
 Tensions along the Israel-Gaza border have been extremely tense over the course of the past week, with an increase in both rocket fire from Gaza and retaliatory air strikes by Israel on the Strip. 
  
 In the most recent exchange, the Israel Air Force bombed an arms depot in northern Gaza, which according to Palestinian sources, belong to the military wing of Hamas. 
  
 The attack was carried out around 8:30 P.M. Thursday local time, after two rockets and several mortars fired from Gaza landed deep into Israel earlier in the day. 
  
 In a separate report carried by Israeli media, contacts from Hamas and Israel are supposedly meeting with a third party in order to bring about a reduction in tensions between the sides. The report, which cannot be confirmed, came from the London based pan-Arab newspaper Asharq Al-Awsat. 
  
 Despite the Israeli strikes on the Strip, Prime Minister Benjamin Netanyahu warned on Thursday that if Hamas chooses to escalate cross-border tensions, Israel's response will be measured. ||||| At the same time that Barak was speaking, a rocket fired from Gaza landed in Sderot. No injuries were reported and no damage was caused.In Gaza, Senior Islamic Jihad leader Khaled al-Tash said that his terrorist group is ready to make moves that would calm the situation in the Strip but that things could evolve if "Zionist aggression" continues, Israel Radio reported Thursday.Public Security Minister Yitzhak Aharonovitch said "We must break the equilibrium under which Hamas fires and we retaliate. We can not accept a situation in which citizens become hostages."When asked during an interview with Channel 2 if Israel will consider a full scale ground invasion to Gaza, Ahronovitch replied, "I do not want to specify what the military options are but we must stop the war of attrition.""We must realize that this can end in tragedy. What if, god forbid, recent attacks had ended in dozens of casualties," asked Aharonovitch. "We would have been forced to take much more severe or comprehensive action," he added.In light of the ongoing rocket threat, classes will not be held Friday in Ashdod, the mayor announced on Thursday. Ashdod Mayor Yehiel Lasri decided to close schools through Sunday, saying he could not take responsibility for “endangering the security of any child in the city.”Classes will also not be held in Kiryat Gat schools, it was reported Thursday.Rockets landed in and north of Ashdod on Thursday afternoon and sirens were heard in Ashdod, Ashkelon, Gedera and Gan Yavne. Another rocket landed in the Eshkol Regional Council, the eighth rocket attack since Thursday morning.IDF tanks shot into Gaza on Thursday, injuring one man, according to Palestinian sources, following five rockets launched from Gaza into Israel. 
  
 Yaakov Lappin contributed to this report. 
  
 The strike came after the IAF struck four targets in Gaza Strip in the early morning, and after Palestinians fired about a dozen rockets and mortars across the border, striking deep into Israel.The tanks shells were aimed at a Hamas facility in Gaza City, which reportedly burst into flames. Earlier Thursday, the IAF bombed terrorists that were attempting to shoot rockets into Israel.Deputy Prime Minister Moshe Ya'alon said on Thursday that Israel "will not tolerate any escalation."Speaking in the US, Ya'alon said that Israel will not tolerate "terrorist attacks or shooting rockets at our citizens."He said that the war against terror "requires a long battle, but it will not stop us from taking care of whomever shoots at Israel as they have in the last few days or [of whomever] sends terrorists to the center of cities.""Whoever does this will not be immune to a decisive attack," Ya'alon said. "Hamas is responsible for everything that is shot out of Gaza and if it does not take responsibility, it will pay the price."Since Thursday morning, three Kassam rockets, one Grad missile and a mortar shell were shot into Israel from Gaza. Grad missiles landed in and north of Ashdod. A previous report erroneously said that a rocket landed in the Rishon Lezion area.Hamas said Israel targeted smuggling tunnels along the Gaza-Egypt border as well as one of its training camps in central Gaza.A third strike hit a power transformer, causing blackouts in the area, witnesses said. Medical workers said no one was injured in the strikes.The IDF confirmed that IAF strikes were carried out in Gaza in response to earlier rocket attacks and that direct hits on multiple targets were recorded. |||||

Israel launched another round of air strikes on the Gaza Strip last night, after Gaza fired a number of rockets deep into Israel. The air strikes hit a number of buildings belonging to Hamas, and initial reports indicate that some people were injured, according to the Jerusalem Post. On the Israeli side, no damage or injuries were reported; a round of retaliatory mortar fire landed in open fields. The strike follows a similar exchange earlier this week. Today, Hamas called on the UN to step in to stop the "crime of the recent attacks on Gaza," accusing Israel of “exploiting regional instability to carry out massacres against Palestinians,” according to Haaretz. But PM Benjamin Netanyahu went on Israeli radio to vow to “respond with the utmost strength to stop terror.” The strikes also got an endorsement from the visiting Robert Gates, who said Israel had a right to defend itself from “these repugnant attacks.”