The Israeli army says warplanes have launched an attack on two tunnels used by smugglers in the southern Gaza Strip in response to a rocket attack.
The military said Sunday two Israel Air Force jets struck two Gaza targets just hours after a Qassam rocket hit a building in the Israeli border town of Sderot, a frequent target of rockets fired from Gaza.
Militants said the Israeli air strike caused damage, but no casualties.
Israeli Prime Minister Benjamin Netanyahu told his Cabinet Sunday that Israel holds the Palestinian militant group Hamas responsible for the violence.
Mr. Netanyahu said Israel retains the right to defend its citizens.
Meanwhile, Hamas promised Saturday to avenge the death of one of its senior commanders, Hamas as Issa Batran, who was killed during a series of Israeli air strikes on Gaza Friday.
Hamas spokesman Sami Abu Zuhri linked the Israeli airstrikes to a recent decision by the Arab League to endorse the idea of direct negotiations between Israel and the Palestinians. He said the decision is allowing Israel to continue committing crimes against the Palestinian people.
Witnesses and medics said at least 11 people were wounded late Friday and early Saturday when Israeli warplanes targeted several sites in Gaza, including a number of buildings and an alleged weapons-smuggling tunnel.
Israeli officials said the air strikes were retaliation for a rocket attack on the southern Israeli city of Ashkelon earlier Friday.