Secretary of State John Kerry is trying to arrange security arrangements between Israel and the Palestinians under a final peace deal.
Israel has demanded it retain a security presence in parts of the West Bank after a deal, citing security concerns. Palestinian President Mahmoud Abbas opposes this, but has said he would accept international peacekeepers.
Hamas spokesman Sami Abu Zuhri said that Hamas will deal with any international force "in the same manner it uses with Israeli occupation forces." Hamas has killed hundreds of Israelis in years of conflict in suicide bombings and other attacks.
The Palestinians want their state to include the West Bank, Gaza Strip and east Jerusalem, territories Israel captured from Jordan and Egypt in the 1967 war.
Israel withdrew its soldiers and settlers from the Gaza Strip in 2005.
Hamas later took over the territory from forces loyal to Abbas in 2007. Since then, Palestinians have been split between Hamas controlling Gaza and Abbas and his secular Fatah party ruling parts of the West Bank.