The Israeli military is concerned about attempts to launch rockets from the northern West Bank into nearby Israeli settlements and towns, according to the newspaper Israel Hayom.

While the rockets that have been tracked up to this point are primitive, Israel believes that Palestinian organizations have clear intentions to emulate the "Gaza model" in the West Bank, the tabloid said. 

The army identified four attempts to launch missiles in the last two months. Although the rockets were initially rough-and-ready, the quality and range of each missile seemed to improve. 

Yitzhak Gershon, a reserve officer in the Israeli army and former commander of the West Bank division, who led a raid on a missile manufacturing plant in the northern West Bank during the Second Intifada, said he is "unsurprised" by the new attempts.

The newspaper said that the army did not know which group was behind the rocket fire, but noted that another major operation - similar to the two-day onslaught on Jenin - is likely to take place. 

The army is also weighing installing a special warning siren system similar to that of Gaza border towns around northern West Bank settlements.