Hospitals were running out of food, fuel and other supplies in southern Lebanon on Thursday and aid groups said fighting and a ban on movement meant they could not reach thousands trapped in the area. Medecins Sans Frontieres said that since an Israeli air strike destroyed the last coastal river crossing for trucks to the south on Monday, aid agencies had been reduced to carrying supplies by hand over a log across the Litani river. It said Israel's warning that it might attack any vehicle south of the Litani that was not part of an aid convoy with Israeli clearance significantly undermined the chances of the tens of thousands of people still believed to be trapped in the region. "The people in the south are afraid. They are terrified to move," Rowan Gillies, president of MSF International, said in Beirut. "To forbid all forms of movement, without distinction, will lead to even more civilian deaths and suffering." MSF said it had suffered close calls with shelling and air strikes close to two of its convoys earlier this week. On Monday, warplanes attacked two cars travelling near a U.N. Nations convoy, killing three people. Israel has drawn international criticism for attacking targets in populated civilian areas. At least 1,011 people have been killed in Lebanon during the four-week-old conflict with Hizbollah fighters. Israel, which has lost 116 dead, mostly soldiers, Reuters reported.