Islamic State's Egypt affiliate, Sinai Province, said on Friday in a statement posted on Twitter by supporters that it had launched three Grad rockets towards "occupied Palestine" earlier in the day.

Israeli security forces said earlier that two rockets landed in open areas in Israel's Negev region. No damage or injuries were reported.

A short time beforehand, rocket sirens sounded in Israeli communities near the Gaza border, after which security forces began a search for the projectiles. Both rockets have since be located.

In response to the firing of the rockets, Eshkol Regional Council head Gadi Yarkoni said: "I trust the army and am certain that it will take all necessary measures to protect communities in the South, and I expect the political leadership to act decisively at all levels in order to ensure a quiet summer in Israel."

Israel believes that the group was indeed behind the rocket fire. A source in the security establishment said the organization's statements are considered reliable.

An image posted by ISIS supporters on Twitter purporting to show a Grad missile being fired from Sinai into Israel.

High alert after Sinai attacks

Israel continued to maintain a high alert following the terrorist attacks in Sinai this week, and closed Route 12, near the Israel-Egypt border, at 5 A.M. Friday morning.

The decision was made by Defense Minister Moshe Ya'alon with the recommendation of IDF Chief of Staff Lt. Gen. Gadi Eisenkot. The road closure was defined by the military as temporary.

One of the attacks in Sinai was carried out only four kilometers from the border with Israel, an officer in the IDF Southern Command said on Thursday. In response, the Israeli military has intensified its intelligence gathering efforts in the area.

One of the rockets fired from Sinai into southern Israel (Eran Senker).