RAMALLAH/JERUSALEM, Oct 20 (Reuters) - Violence in the occupied West Bank has surged since Israel began bombarding the Gaza Strip and clashing with Hezbollah at the Lebanon border, fuelling concerns that the flashpoint Palestinian territory could become a third front in a wider war.

Israel is waging war against the militant Hamas group in the Palestinian enclave of Gaza, but Israeli soldiers and settlers pulled out of Gaza in 2005. Israel still occupies the West Bank, captured along with Gaza in a 1967 Middle East war.

Hamas, which controls Gaza, killed more than 1,400 people in a surprise attack in Israel on Oct. 7, prompting an Israeli bombardment that has killed 3,500 in Gaza. Israel is preparing a full-scale ground assault on Gaza to destroy Hamas.

Western countries supporting Israel fear a wider war that would open up Lebanon, with its Iran-backed group Hezbollah, as a second front and the West Bank as what Israeli media call a potential third front.

Clashes between Israeli soldiers and settlers and Palestinians have already turned deadly. More than 80 Palestinians have been killed in West Bank violence since Oct. 7 and Israel has arrested more than 900 people. It conducted fresh overnight and dawn raids on Friday and detained scores more.

Israeli forces raided and carried out an air strike in a Palestinian refugee camp in the West Bank on Thursday, killing at least 12 people, Palestinian officials said, and Israeli police said an officer was killed during the raid.

The violence poses a challenge to both Israel and to the Palestinian Authority (PA), the only Palestinian governing body recognised internationally which is headquartered there.

The Israeli military said it was on high alert and bracing for attacks including by Hamas militants in the West Bank.

Hamas was trying to "engulf Israel in a two- or three-front war", including the Lebanese border and the West Bank, military spokesperson Lieutenant Colonel Jonathan Conricus told Reuters. "The threat is elevated," he said.

Photo from Reuters