The Israeli military confirmed Saturday that an infiltration had occurred in several locations near the Gaza border in southern Israel. It ordered residents to remain indoors.
"In the last hour, the Hamas terrorist organization had begun a massive shooting of rockets from the Gaza Strip into Israeli territory, and terrorists infiltrated into Israeli territory in a number of different locations," it said.
Cities and towns in southern Israel emptied as the military closed roads near Gaza and millions of Israelis scrambled to bombs shelters while air raid sirens wailed overhead. In the kibbutz of Nahal Oz, just 4 kilometers from the Gaza Strip, terrified residents who were huddled indoors said they could hear constant gunfire echoing off the buildings.
The army said residents next to Gaza should stay in their homes due to the infiltration.
"With rockets we somehow feel safer, knowing that we have the Iron Dome (missile defense system) and our safe rooms. But knowing that terrorists are walking around communities is a different kind of fear," said Mirjam Reijnen, a 42-year-old volunteer firefighter in Nahal Oz, adding that she and her three kids have been too scared to leave the shelter even for a moment to use the bathroom.
Israel has built a massive fence along the Gaza border meant to prevent infiltrations. It goes deep underground and is equipped with cameras, high-tech sensors and sensitive listening technology. The infiltration marked a major accomplishment - and escalation - by Hamas.
The sound of outgoing rockets whooshing through the air could be heard in Gaza and sirens wailed in Tel Aviv and Jerusalem during an early morning barrage that lasted for over two hours. Israel's Magen David Adom rescue agency said a 70-year-old woman was critically injured when a rocket hit a building in southern Israel. Elsewhere, a 20-year-old man was moderately injured by rocket shrapnel, it said.
The launches came after weeks of heightened tensions along Israel's volatile border with Gaza, and heavy fighting in the Israeli-occupied West Bank.
Israel has maintained a blockade over Gaza since Hamas, an Islamic militant group that opposes Israel, seized control of the territory in 2007. The bitter enemies have fought four wars since then. There have also been numerous rounds of smaller fighting between Israel and Hamas and other smaller militant groups based in Gaza.
The blockade, which restricts the movement of people and goods in and out of Gaza, has devastated the territory's economy. Israel says the blockade is needed to keep militant groups from building up their arsenals. The Palestinians say the closure amounts to collective punishment.
The rocket fire comes during a period of heavy fighting in the West Bank, where nearly 200 Palestinians have been killed in Israeli military raids this year. Israel says the raids are aimed at militants, but stone-throwing protesters and people uninvolved in the violence have also been killed. Palestinian attacks on Israeli targets have killed over 30 people.
The tensions have also spread to Gaza, where Hamas-linked activists held violent demonstrations along the Israeli border in recent weeks. Those demonstrations were halted in late September after international mediation.