RAMALLAH - Israel has razed more Palestinian homes and other structures so far this year than in all of 2015, the United Nations said Friday, as the United States and France expressed concern.

Israeli authorities in the occupied West Bank and annexed east Jerusalem have demolished 726 structures this year, displacing 1,020 Palestinians, the UN Office for the Coordination of Humanitarian Affairs (OCHA) said.

In the whole of 2015 there were 533 demolitions and 688 people displaced, OCHA said. The structures included houses, shelters for livestock and installations such as solar panels.

Many were funded by foreign donors such as the European Union and its individual member states, which say they are working to meet urgent humanitarian needs of people under military occupation.

Israel says it forbids unlicensed construction, invoking treaties with the Palestinians that give it full control over 60 percent of the West Bank designated as "Area C" and asserting sovereignty over all of Jerusalem.

Between August 2 and 8, OCHA said, "in 14 separate incidents in Area C and east Jerusalem, the Israeli authorities destroyed, forced owners to destroy, or confiscated 42 structures for lack of building permits, displacing 30 people."

Israeli NGO B'Tselem said that since the start of the year Israel razed at least 188 homes in the West Bank alone, "the highest number since B'Tselem began documenting home demolitions on grounds of 'lack of building permits' in 2006."

France on Thursday condemned Israel's destruction last week of structures it funded in the West Bank village of Nabi Samuel.

It was the third time this year that Israel has torn down French-financed structures, said a French foreign ministry statement, "which includes the dismantling of a school in February."

"France is deeply concerned by the accelerated pace of demolitions and confiscations of humanitarian structures that should benefit the Palestinian population living in Area C," it added.

"We call on the Israeli authorities to put an end to these practices which are contrary to international law."

In Washington, the US State Department said it was worried about Israeli plans to raze the tiny Palestinian village of Susiya, in the southern West Bank.

"If the Israeli government proceeds with demolitions in Susiya, it would be very troubling and would have a very damaging impact on the lives of the Palestinians living there who have already been displaced on other occasions," spokeswoman Elizabeth Trudeau told reporters.

The village has been torn down before and its homes are mainly tents, caves and makeshift structures, along with a children's playground.

Meanwhile, Israel is working to transplant an illegal West Bank settlement scheduled for demolition to Palestinian land nearby, effectively legalising the rogue outpost, an Israeli NGO said Friday.

"They have started the process of taking land," Hagit Ofran, of settlement watchdog Peace Now, told AFP.

An advertisement bearing the crest of Israel's civil administration, a unit of the defence ministry in the occupied West Bank, appeared in Palestinian daily Al-Quds on Thursday listing several plots of land near the Amona settlement, north of Ramallah.

It said that they are considered to be the property of absentee Palestinian owners and therefore liable to seizure.

Anyone claiming legal ownership is invited to lodge objections within 30 days of the ad's publication, it said

"The civil administration has opened a process where it is announcing that it intends to make use of these properties which are near Amona," Ofran said.

"It can be assumed that the takeover's purpose is to allow the relocation of the settlers of Amona from the land they are currently occupying," a Peace Now statement added.

The United States said late Thursday it was "deeply concerned" by the Israeli plan.

"This would represent an unprecedented and troubling step that's inconsistent with prior Israeli legal opinion and counter to longstanding Israeli policy to not seize private Palestinian land for Israeli settlements," State Department spokeswoman Elizabeth Trudeau told reporters.

Israel considers settlement outposts built without government approval to be illegal and sometimes sends security personnel to demolish them.