In response to the barrage, the heaviest since Operation Protective Edge, Israel struck more than 70 sites belonging to Hamas and Palestinian Islamic Jihad, the two largest terrorist groups based in Gaza.
"Israel is Europe's shield in the Middle East [from terrorism], and without us it would spread and many more people would push into Europe", said Netanyahu to reporters at the sidelines of an event marking 100 years since World War I. The others landed in open areas, according to the military.
Smoke rises after an Israeli airstrike in Gaza.
Artillery units near the Gaza-Israel buffer zone have reportedly targeted concentrations of Palestinian activists in central Gaza, along with resistance positions in the town of Jabalia and the city of Deir al-Balah.
There was also an anti-tank missile strike on an Israeli bus near the Gaza border, in which an IDF soldier was seriously wounded.
Al-Qassam agents stopped it and wanted to search it, realised it was an Israeli operation and confronted them, it said in a statement.
On Sunday, Israeli Prime Minister Benjamin Netanyahu said he hoped to reach an "arrangement" that would avoid another conflict and ease Israeli-blockaded Gaza's economic hardships.
The flareup came a day after an Israeli incursion prompted deadly fighting in the enclave and cast a new cloud over efforts by Egypt, Qatar and the United Nations to broker a long-term ceasefire between Israel and Hamas, the dominant armed group in Gaza.
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The Israeli army did not released the identity of the dead soldier because of his involvement in similar undercover operations.
A map shows the locations of an Israel raid late on Sunday and a bus hit by a mortar fired from Gaza on Monday.
"This violence prevents any real help for the people of Gaza", he said.
There were no reports of injuries or damage in Israel in the incidents on Sunday, but the military said a lieutenant-colonel, identified only as "M", had been killed in the raid and another officer wounded.
The enemies have fought three wars in the past decade. Conricus said others were injured in the attack, but gave no further details. The officer's funeral was held Monday. "Everyone must step back from the brink", he said. According to the IDF, Hamas uses the station not just to transmit instructions to operatives in the West Bank, but also for incitement and terror training. He said the force faced a "very complex battle" and was able to "exfiltrate in its entirety".
The bombardment - the heaviest since 2014 - was such that the sheer number of projectiles overwhelmed Israel's advanced Iron Dome missile defence system, wounding at least five Israelis. Sirens, warning of more inbound rockets, continue to sound in southern Israel.
"Terrorists in Gaza are again attacking Israel with tools of war". The cash came with vital fuel for a power plant, too.
Israeli forces bombed Hamas's television station in Gaza yesterday after the Palestinian militants fired hundreds of missiles across the border to avenge seven fighters killed by the Israelis in a botched commando raid. "It's a question of alternatives", Netanyahu said Saturday.