CNN

WASHINGTON (CNN) – President Barack Obama has decided to send a U.S. ambassador back to Syria, a dramatic sign of reconciliation between the two countries, senior administration officials tell CNN. The announcement is expected to be made this week.

"It's in our interests to have an ambassador in Syria, a senior administration official told CNN Tuesday night. "We have been having more and more discussions and we need to have someone there to engage."

The official said that the decision was not in any way related to the election crisis in Iran, although the Obama administration has maintained engaging the Syrian regime could weaken Syria's strategic alliance with Iran.

Syrian Ambassador to the United States Imad Moustapha said his country had not formally been notified of the decision, but told CNN if this is true it reflects the genuine desire by the United States of America to correct the past efforts of the Bush administration and engage Syria.

It's good for the United States, it's good for Syria and it's good for the region, Moustapha said.

The senior administration officials say Obama has not chosen an individual to serve as ambassador. Once he does, the name must go through an informal vetting process with the Syrians before the president's choice is nominated and confirmed.

The United States withdrew its ambassador from Syria four years ago in protest at the assassination of former Lebanese Prime Minister Rafik Hariri. Washington accuses Syria of being behind the killing of the popular statesman in a massive bombing that also left 22 others dead. Syria denies it, but an ongoing United Nations investigation has found indications of Syrian involvement.

A charge d'affaires has been the highest-level American diplomat in Damascus since 2005.

In anticipation of sending an ambassador back to Syria, Assistant Secretary of State for Diplomatic Security Eric Boswell recently traveled to Syria to examine the security situation there. The United States also is interested in building a new embassy in Damascus.

The decision comes on the heels of a visit two weeks ago by Mideast peace envoy George Mitchell to Syria, where he said he had "serious and productive discussions" with Syrian President Bashar al-Assad about President Obama's goal of a "comprehensive peace," which includes peace between Israel and Syria, and Israel and Lebanon.

"We intend to pursue this as vigorously as possible," Mitchell said.

The visit was part of a series of actions between the two sides that could pave the way for dramatically improved ties.

Last week U.S. Gen. Ray Odierno, commander of U.S. forces in Iraq, told reporters that "Syria has been taking some action" to stop the flow of foreign fighters into Iraq.

Jeffrey Feltman - an assistant secretary of state who is the department's top official on the Middle East - and National Security Council official Daniel Shapiro traveled to Damascus twice in recent months in an effort to improve ties with Syria.

The talks, which have been the start of more regular contacts between Washington and Damascus through normal diplomatic channels, focused in part on getting Syria to seal its border with Iraq. Washington has criticized Damascus for turning a blind eye to foreign fighters traveling through Syria into Iraq.

Mitchell's recent visit took place on the heels of President Obama's Cairo speech to the Muslim world, where he pledged to pursue a broad-based, comprehensive peace agreement in the region

While Mitchell was in the region, Syria also hosted a delegation of U.S. military commanders in Damascus to discuss joint efforts to stem the insurgency in Iraq.

"All of theses talks, the quality of the discussion and the level of engagement has been unprecedented, at least for the last eight years," Moustapha said.

The United States also wants Syrian support in achieving a comprehensive Arab-Israeli peace, and appears willing to nurture indirect peace talks between Syria and Israel, which began last year, over the disputed Golan Heights.

Those talks were suspended after Israel's three-week offensive in the Gaza Strip that ended in mid-January. Damascus wants the United States to become involved if the talks resume.

And the U.S. is interested in getting Damascus to use its influence with Hamas, which Syria views as a legitimate resistance movement and whose leaders take refuge in Syria.

(updated 10:40 p.m. with additional information)