Palestinian and Israeli killed in spate of Middle East violence By Kareem Khadder, CNN Israeli Prime Minister Benjamin Netanyahu expressed his condolences to the murdered Israeli settler's family. Police: A Palestinian man kills an Israeli settler in the West Bank Assailants stab a Palestinian man in a Jerusalem neighborhood Israeli says it makes a "direct hit" on a suspected terrorist in Gaza A Palestinian says the airstrike killed a hospital security officer Jerusalem (CNN) -- A Palestinian man kills an Israeli settler at a bus stop in the West Bank. Another Palestinian is stabbed in an ultra-orthodox Jerusalem neighborhood. And an Israeli airstrike claims the life of a Palestinian in Gaza. The three incidents Tuesday are not related, but add to the continuing tension between the two sides in the region. West Bank stabbing The West Bank attack took place at a bus stop near the city of Nablus. Police said the man stabbed the settler, seized his pistol and fired at arriving officers. He was taken into custody, but police do not yet have a motive for the killing. Prime Minister Benjamin Netanyahu expressed his condolences to the family of Evyatar Borovsky, the man killed in the stabbing, before a meeting with Serbian President Tomislav Nikolic. It was the first fatal attack on a settler since March 2011, when Udi and Ruth Fogel and three of their children were killed in the West Bank. Jerusalem stabbing The second stabbing incident took place in the neighborhood of Mea Shearim, Israeli police spokesman Micky Rosenfeld said. The assailants who stabbed a Palestinian man fled the scene, Rosenfeld said. The victim was taken to a hospital for treatment. Gaza airstrike The Israeli airstrike in Gaza targeted a man suspected of taking part in the Eilat attack earlier this month, the Israeli military said. Israel Defense Forces said it targeted 24-year-old Hithem Ziad Ibrahim Masshal in the strike, and that "a direct hit was confirmed." But Ashraf Al Qudra, spokesman for the Palestinian health minister in Gaza, said the strike killed a 29-year-old hospital security officer riding on a motorbike. Another person riding on the bike was seriously wounded, medics said. Netanyahu said militant rocket attacks, like the one that prompted the Israeli airstrike, aren't acceptable and won't be tolerated. "We will act, and are acting, in order to defend Israeli citizens," he said Tuesday. CNN's Saad Abedine contribute to this report.