The United States believes any Palestinian government must renounce violence, respect past peace deals and recognize Israel's right to exist if it is to play a constructive role, a U.S. official said on Wednesday.

The official was commenting on reports that Palestinian President Mahmoud Abbas's Fatah movement has struck an agreement with bitter rival Hamas on forming an interim government and fixing a date for a general election.

The United States supports the reconciliation on "terms which promote the cause of peace", the State Department said following the announcement.

"We have seen the press reports and are seeking more information. As we have said before, the United States supports Palestinian reconciliation on terms which promote the cause of peace," the State Department said.

"To play a constructive role, any Palestinian government must accept the Quartet principles by renouncing violence, accepting past agreements, and recognizing Israel’s right to exist."

The White House said it was seeking more information about the reported deal, calling Hamas terrorists.

"The United States supports Palestinian reconciliation on terms which promote the cause of peace. Hamas, however, is a terrorist organization which targets civilians," White House spokesman Tommy Vietor said in a statement.