At least six Palestinians have been shot dead and dozens more injured by Israeli forces as hundreds of them demonstrated along the border in the eastern Gaza Strip. Friday's violence comes as clashes have increased in frequency since Israeli security forces began to crack down on Palestinian worshippers at the al-Aqsa Mosque compound in the occupied East Jerusalem last month. "It is very dangerous here," Ezz Zanoun, a Gaza-based photographer who was at the protest, told reporters. "They always shoot at the border, but it's much worse today than usual." Among those killed was a 15-year-old boy who was fatally shot at another demonstration in the al-Faraheen village, southeast of Gaza City. Medical sources have said that out of the 70 injured in the firing near the border with Israel, at least 10 are in critical condition. "At first they started shooting with rubber-coated steel bullets and stun grenades, then they fired live ammunition at us," he said. "Dozens have been injured, but the number is growing because the clashes are still going on." "There are injured people everywhere," he said. "The bullets are flying everywhere."