At least 250 Palestinian and left-wing demonstrators clashed with Border Police forces at the Kalandia checkpoint between Jerusalem and Ramallah Sunday afternoon as part of "Naksa Day," or the 44th commemoration of the 1967 Six-Day War Palestinians see as a "setback" due to the capture of their land.Channel 10 reported that protesters threw rocks, Molotov cocktails, and burning tires in the direction of police forces, who responded by firing tear gas and shock grenades. As winds began blowing the gas back at police officers, security forces began firing rubber bullets in an attempt to disperse the demonstration.RELATED: Naksa Day: 3 reported dead, 10 hurt on Israel-Syria borderEditorial: Gearing up for NaksaPM: We will protect borders with determination, restraintIn light of the demonstration, the IDF closed the Kalandia crossing, the IDF spokesperson said, adding that one Border Police officer was lightly injured by stones thrown by Palestinians.Forty Palestinians were injured during the course of the demonstration, Israel Radio reported.In Hebron, protesters threw rocks and bottles at a kindergarten in Beit Hadassah. The children were brought inside and no injuried were reported. In other areas of the West Bank, dozens of Palestinians and left-wing activists marched toward the Elon Moreh settlement, attempting to break through the village's gates. Protesters were dispersed after setting a small fire, which was subsequently extinguished.In Ramallah, a 200-person rally was taking place in the city's main Manara Square. In Gaza's Beit Hanun, hundreds of Palestinian held a march, with some 20 managing to reach the Erez Border Crossing, Israel Radio reported, citing Hamas security sources.