Palestinians opened fire at Palestinian security headquarters and forced government offices to close in Jenin on Saturday, demanding that they receive long-overdue salaries promised by the government, witnesses said. About 20 members of the Aksa Martyrs Brigades gathered outside the security building, periodically firing rounds. There were no reports of injuries, and security officers inside the building did not fire back, the witnesses said. Before marching on the building, the Aks members distributed notices declaring government offices closed, witnesses said. Government workers obeyed the order and left their offices, they said.