"We are deeply concerned by reports today that the government of Israel has published tenders for 323 units in east Jerusalem settlements," State Department spokesman John Kirby said in a statement yesterday.
"This follows Monday's announcement of plans for 770 units in the settlement of Gilo."
"These steps by Israeli authorities are the latest examples of what appears to be a steady acceleration of settlement activity that is systematically undermining the prospects for a two-state solution," Kirby said.
Palestinian leaders and the United Nations joined in condemning plans advanced this week for 770 new homes that would expand the Gilo settlement on the southern perimeter of east Jerusalem.
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They are part of a larger Israeli plan for around 1,200 units approved some three years ago, according to Ir Amim, an NGO that monitors Israeli settlement activity.
Israeli settlements in east Jerusalem and the occupied West Bank are viewed as illegal under international law.
A recent report by the diplomatic Quartet -- the United States, European Union, Russia and the UN -- said settlement expansion was eroding the possibility of a two-state solution to the conflict.
Kirby also voiced concern about increased demolitions of Palestinian structures in the West Bank and east Jerusalem, which reportedly left dozens of Palestinians homeless, including children.
"More than 650 Palestinian structures have been demolished this year, with more Palestinian structures demolished in the West Bank and east Jerusalem thus far than in all of 2015," he said.
Israel occupied the West Bank and east Jerusalem in 1967. It later annexed east Jerusalem, which Palestinians view as their future capital.