The United States government has committed to playing a role in indirect talks between Israel and the Palestinian Authority, and promised that if the talks were to fail, the U.S. will assign blame and take action, according to a document sent by the U.S. to the Palestinian Authority, which Haaretz obtained on Friday.

The U.S. government sent the document to the Palestinians responding to their inquires regarding the U.S. initiative to launch indirect talks between Israel and the Palestinians.

"We expect both parties to act seriously and in good faith. If one side, in our judgment, is not living up to our expectations, we will make our concerns clear and we will act accordingly to overcome that obstacle," it was written.

This commitment by the U.S. was a determining factor in the Palestinians' and the Arab League's decision to agree to the U.S. proposal on indirect talks.

The document also reveals that U.S. involvement will include "sharing messages between the parties and offering our own ideas and bridging proposals."

The U.S. also emphasized that their main concern is establishing a Palestinian state.

"Our core remains a viable, independent and sovereign Palestinian State with contiguous territory that ends the occupation that began in 1967," the document read.

Regarding the settlements, the U.S. noted its continued commitment to the road map, which dictates that Israel must freeze all construction in the settlements, and dismantle all outposts erected since March 2001.

"Palestinian leaders gave the U.S. response a warm welcome"

A prominent Palestinian official told Haaretz that the Palestinian leadership welcomed the U.S. response, and the only reason PA President Mahmoud Abbas delayed responding to the U.S. initially was so he could receive support from the Arab League.

The Palestinians are especially satisfied from the U.S. commitment to put the blame on the side responsible if the talks fail.