U.S. President Barack Obama declared Thursday that the borders of Israel and a Palestinian state must be based on 1967 lines, likely setting up a new clash with Israeli Prime Minister Benjamin Netanyahu.

In a long-awaited survey of the "Arab spring" of revolts, Obama compared "shouts of human dignity" across the region to America's birth pangs and civil rights struggles, and said the uprisings showed repression would not work.

U.S. Assistant Secretary of State for Near Eastern Affairs Jeffrey Feltman arrived in Beirut on Thursday for talks with President Michel Suleiman, Speaker Nabih Berri and Prime Minister-designate Najib Miqati.

He may also meet with caretaker Prime Minister Saad Hariri, who is currently abroad.

U.S. President Barack Obama on Wednesday sanctioned Syrian President Bashar al-Assad and six top aides over their crackdown on popular protests, telling Assad to launch a transition to democracy or step down.

Obama signed the executive order to "increase pressure on the government of Syria to end its use of violence and begin transitioning to a democratic system that ensures the universal rights of the Syrian people," the document said.

U.S. Assistant Secretary of State for Near Eastern Affairs Jeffrey Feltman is expected to arrive in Beirut on Thursday on a one-day visit where he is set to hold talks with a number of high-ranking officials during the day, sources told Naharnet on Wednesday.

He is scheduled to later meet political officials over a dinner banquet at the U.S. Embassy.

The United States and the European Union warned Tuesday that they will within days take further punitive steps against Syria over its deadly crackdown on pro-democracy protests, as France said the U.N. Security Council is close to achieving a majority for a resolution to condemn the repression.

The warning came as diplomats in Brussels told Agence France Presse that EU ambassadors were due to decide Tuesday whether to add President Bashar al-Assad's name to a list of Syrian officials targeted by a travel ban and assets freeze.

Pakistan and the United States sought Monday to smooth a damaging row caused by Osama bin Laden's killing, calling for closer cooperation with U.S. Secretary of State Hillary Clinton poised to visit.

Pakistan's civilian and military leaders were left angry and embarrassed over a unilateral U.S. raid on May 2 that discovered and killed al-Qaida's chief living, possibly for years, two hours' drive from the Pakistani capital.

The White House said Monday it regretted the loss of life on the Lebanese-Israeli border and urged "maximum restraint" among all parties but said the U.S. ally has the right to thwart unauthorized crossings.

"We regret the loss of life and our thoughts are with the families and loved ones of those killed and wounded," spokesman Jay Carney told reporters aboard President Barack Obama's official Air Force One airplane.

President Barack Obama Friday announced his "tireless" envoy to the Middle East, George Mitchell, was resigning, but vowed the U.S. administration remained committed to the faltering peace process.

Describing Mitchell as having taken on "the toughest job imaginable," Obama paid tribute to the veteran diplomat who had "worked grueling hours to advance the interests of the United States and the cause of peace."

U.S. Ambassador to Lebanon Maura Connelly on Thursday held talks with Prime Minister-designate Najib Miqati and discussed with him the U.S. administration’s “developing view on the dramatic events that have occurred and continue to occur in the region,” the U.S. Embassy said in a statement after the meeting.

“Connelly expressed the U.S. government’s view that the governments of the region ought to listen to their people, refrain from violence, and engage in political dialogue in order to insure that the legitimate changes and reforms they demand can begin to be implemented,” according to the embassy’s statement.

U.S. Secretary of State Hillary Clinton on Thursday blasted Syria's use of strength as "a sign of remarkable weakness" at a news conference in the Greenland capital.

Syria's repression of protests "is a sign of remarkable weakness," Clinton told reporters at an Arctic Council meeting, stressing Syria continued with "a brutal crackdown" on demonstrators despite overwhelming international condemnation.