NABLUS (AFP) - The Israeli army on Tuesday ordered the closure of a shopping mall in the West Bank, saying the company that runs it is linked to Hamas, Palestinian security officials and witnesses said. Computers, furniture and documents were seized in the pre-dawn raid on Al-I'itiman Investment Co in the city of Nablus's only mall, with soldiers posting a closure notice. After August 15, anyone running a store in the five-storey mall which has dozens of shops "could face five years in jail," the order reads. A military spokesman said the army was acting "against charitable organisations acting on behalf of Hamas." He charged that the organisations sought to strengthen the Islamist movement, "to encourage attacks against Israel", and "to give financial support to terrorism infrastructure." Directors of Al-I'itiman were not available for comment on the accusations. Nablus mayor Jamal Muheissen slammed the closure, saying the "mall belongs to the people and not to Hamas, and it operates in accordance with Palestinian Authority regulations." Many of the shopkeepers staged a march in Nablus to protest the action. Israeli Soldiers also searched the offices of several charitable organisations in the Nablus area, Palestinian officials said. Meanwhile, Palestinian Attorney-General Ahmed al-Mughani was unhurt on Tuesday when an explosive device placed next to the fuel tank of his car set off a small blast, he and police said. The explosion damaged the car but did not cause any casualties, police said. Mughani told AFP he heard "a weak explosion" in the back of his car as he drove to work in the West Bank political capital of Ramallah. Meanwhile, Israel on Tuesday again closed its crossings with the Hamas-ruled Gaza Strip a day after Palestinians fired a mortar shell in violation of a fragile three-week ceasefire. The closure and the subsequent halt in transferring badly-needed supplies into the impoverished Gaza Strip was ordered by Israeli Defence Minister Ehud Barak, a military spokesman told AFP. This is the fourth time Israel has shut down its crossings with Gaza in response to Palestinian fire since the Egyptian-brokered ceasefire agreement took effect on June 19.