Israel strikes targets across Gaza Strip

JERUSALEM -- Israeli forces Monday struck targets across the Gaza Strip, including the offices of Hamas' supreme leader, in response to a surprise rocket attack from the Palestinian territory, as the military bolstered its troops and rocket-defense systems in anticipation of a new round of heavy fighting with the Islamic militant group.

Israel opened public bomb shelters in most major cities, and civil defense authorities canceled sports events and public transportation in southern Israel. The Israeli army said air raid sirens wailed across southern Israel late Monday night, and Israeli media reported at least 10 rockets fired into the country, but it provided no further details.

"Israel will not tolerate this. I will not tolerate this," Prime Minister Benjamin Netanyahu declared during a White House meeting with President Donald Trump.

"Israel is responding forcefully to this wanton aggression," he said. "We will do whatever we must do to defend our people and defend our state."

Late Monday, Hamas announced a cease-fire had been brokered by Egyptian mediators. But shortly after, renewed rocket fire could be heard in Gaza, setting off air-raid sirens in southern Israel.

Ahead of the Israeli airstrikes, Hamas' leadership went into hiding.

Several airstrikes rocked Gaza, including an explosion destroying the office of Hamas leader Ismail Haniyeh. The Israeli military confirmed the bombing, saying the building had "served as an office for many military meetings." An earlier blast destroyed a multistory building in Gaza City that Israel said had served as a Hamas military intelligence headquarters.

There were no immediate reports of casualties. In both blasts, Israel fired warning shots to evacuate the buildings. But the airstrike on the multistory building was so powerful it sent debris flying onto the roof of The Associated Press bureau, located on the 11th floor of a nearby high-rise.

The sudden conflagration came at a time when both Netanyahu and his Hamas foes are in desperate situations.

Netanyahu is in a tight race for re-election, and just two weeks before the April 9 vote, faces tough criticism from challengers who accuse him of being too soft on Hamas.

In Washington to celebrate the U.S. recognition of Israel's control of the Golan Heights, Netanyahu instead was forced to cut short his trip under heavy pressure to strike back at Hamas. Later Monday, Netanyahu remained in Washington past his scheduled departure time, huddled in conference calls with security officials, Israeli media said.

Haniyeh issued a statement warning Israel against heavy retaliation. He said the Palestinian people "will not surrender" and its militant factions "will deter the enemy if it exceeds the red lines."

In Beirut, the powerful Lebanese militant group Hezbollah said its leader, Hassan Nasrallah, met Monday with a senior Hamas delegation. Hezbollah said they discussed the Gaza situation and "Israeli aggression."

Hamas is facing perhaps its toughest domestic test since seizing control of Gaza from the rival Palestinian Authority 12 years ago.

An Israel-Egyptian blockade, imposed to weaken Hamas, combined with sanctions by the Palestinian Authority and mismanagement by the Hamas government, have all fueled an economic crisis leaving Gaza with an unemployment rate above 50 percent.

Hamas has been leading weekly protests along the Israeli border for the past year in hopes of easing the blockade, but the demonstrations, in which some 190 people have been killed by Israeli fire, have done little to improve conditions.

Last week, hundreds of Gazans protested the dire conditions, a rare expression of public discontent against the authoritarian government. Hamas responded with a violent crackdown, beating and arresting dozens of demonstrators and drawing rare public criticism.

The rocket attack, which caught Israel off guard, may have been an attempt by Hamas to divert attention from its growing domestic woes.

Israel and Hamas have fought three wars, most recently in 2014. Although neither side appears to have an interest in another war, fighting could easily spin out of control. The 2014 conflict lasted 50 days and ended with more than 2,000 Palestinian deaths, including hundreds of civilians, and 73 killed on the Israeli side.

Netanyahu faces the difficult task of delivering a tough blow to Hamas while avoiding protracted fighting potentially working against him on election day.

Yaakov Amidror, a former national security adviser to Netanyahu, said a mild response was not an option.

"It will be something on a bigger scale," he said. "He doesn't want a war before elections, but they put him in a corner."