Israel has advanced plans for more than 3,000 homes in West Bank settlements this week, despite US President Donald Trump's call to hold back on such projects as he seeks ways to restart peace efforts.

Israel pushed forward with the plans as it also marked 50 years since the Six-Day War, fought from June 5-10, 1967 and which began its continuing occupation of the West Bank.

A total of 3,178 housing units were advanced in a number of different settlements, the Peace Now NGO that tracks settlement growth told AFP on Thursday.

They are the first new settlement announcements since Trump's visit to Israel and the Palestinian territories last month, when he tried to encourage both sides back to the negotiating table.

Trump has called on Prime Minister Benjamin Netanyahu to hold back on settlement building for now, but the right-wing Israeli leader has been under intense pressure from settler leaders.

The powerful settler movement wields heavy influence in Netanyahu's right-wing governing coalition.

On Tuesday, a defence ministry planning committee advanced 1,500 units, while more than 900 more were added on Wednesday, Peace Now said.

In a separate process, 688 homes were advanced by the committee late on Wednesday and will now go out for a 60-day public comment period during which objections can be filed.

The plans are at various stages in the process and the units are in a number of settlements across the West Bank.

- 'Ultimate deal' -

Palestinian president Mahmoud Abbas condemned the plan for the new housing units.

Israeli authorities did not immediately respond to requests for comment.

More than 600,000 Israelis live in settlements in the West Bank, including in annexed east Jerusalem.

They live alongside some three million Palestinians.

Settlements are considered illegal under international law and are seen as a major obstacle to peace and the so-called two state solution -- the creation of an independent Palestinian state alongside Israel.

Israel blames Palestinian incitement and intransigence for the ongoing conflict.

While the majority of the planned homes are in pre-existing settlements, some will be built in the first new official settlement in some 25 years, Peace Now said.

Last month, Trump visited Israel and the Palestinian territories, meeting both Netanyahu and Abbas as he seeks what he has called the "ultimate deal".

However, Trump has given no details about how he plans to restart talks, and there is deep scepticism over whether such an effort would have any chance of success.

Netanyahu has said he still supports a two-state solution, but peace advocates say his actions show otherwise.

On Tuesday, the premier told settlers he would keep building across the West Bank.

- 'Strong pressure' -

"Netanyahu has been trying to hold back but he has been under very strong pressure from the settlement movement," Ofer Zalzberg of the International Crisis Group think tank said.

"In the last two weeks there has been an all-out war and he caved in."

Abbas's spokesman called Netanyahu's statements a "challenge" to Trump and the international community.

"It is a challenge to (Trump's) efforts to create an appropriate atmosphere for a serious political process, and a blatant challenge to the international community as a whole," a statement said.

Hugh Lovatt, Israel coordinator at the European Council on Foreign Relations think tank, said the new settlements would not totally derail Trump's push.

The Palestinians have previously demanded a settlement freeze as a precondition to returning to negotiations, but there have been suggestions Abbas has dropped this since Trump came to power.

"Prior to Trump's election the announcement by Israel of new settlement homes would be seen as torpedoing hopes for negotiations and would see the Palestinians walk away," Lovatt said.

"Now Abbas has indicated he is no longer holding Israel to even a partial freeze -- he will go back into negotiations without preconditions."

But Zalzberg said more settlement announcements could push the two sides further apart.

"It is becoming more difficult to square the circle to get negotiations going," he said.