Israeli forces began an extended raid in the early hours of Friday in the Nur Shams area, near the flashpoint Palestinian city of Tulkarm and were still exchanging fire with armed fighters well into Saturday.
Israeli military vehicles massed and bursts of gunfire were heard, while at least three drones were seen hovering above Nur Shams, an area housing refugees and their descendants from the 1948 war that accompanied the creation of the state of Israel.
The Tulkarm Brigades, which groups forces from numerous Palestinian factions, said its fighters exchanged fire with Israeli forces on Saturday.
The West Bank, a kidney shaped area about 100 km long and 50 km wide that has been at the heart of the Israeli-Palestinian conflict since it was seized by Israel in the 1967 Middle East war.
The Gaza war has overshadowed continuing violence in the territory, including regular army raids on militant groups, rampages by Jewish settlers in Palestinian villages, and street attacks by Palestinians on Israelis.
Thousands of Palestinians have been arrested and hundreds killed during regular operations by Israeli army and police since the start of the Gaza war, most members of armed groups, but also stone-throwing youths and uninvolved civilians.
On Saturday, Palestinian health authorities said at least 14 Palestinians, two of whom were identified by Palestinian sources and officials as a gunman and a 16 year-old boy, were killed during the raid, one of the heaviest casualty totals in the West Bank in months. Another man was killed on Friday.
The Israeli military said a number of militants were killed or arrested during the raid, and at least four soldiers were wounded in exchanges of fire.
In a separate incident, the Palestinian health ministry said a 50-year-old ambulance driver was killed by Israeli gunfire near the village of Al-Sawiya, south of the city of Nablus, as he was making his way to transport people injured during the attack on the village.
It was not immediately clear whether he was shot by settlers. There was no immediate comment from the military.
