US President Barack Obama ended his three-day official trip to Israel Friday after paying tribute to Israel's national heroes and Holocaust victims.

He paid his respects early in the morning to modern Zionism founder Theodore Herzl and slain Israeli Prime Minister Yitzhak Rabin, who became a symbol of peace after his assassination, at Mount Herzl, and told members of the Rabin family that he is committed to the peace process.

"During the Holocaust, the Jewish People were helpless and its rescuers came too late. Today, the Jewish People have a state and an army and it can defend itself by itself against any foe," he said during the visit.

During his three-day visit, the first to Israel and the West Bank since he became president, Obama has not offered concrete peace plans, but spoke about the necessity for Israelis and Palestinians to renew peace negotiations.

"The only way for Israel to endure and thrive as a Jewish and democratic state is through the realization of an independent and viable Palestine. Given the frustration in the international community, Israel must reverse an undertow of isolation," Obama said Thursday during a keynote speech for students in Jerusalem.

During this speech, considered by many analysts in Israel as " historic," Obama underlined America's support for Israel, but also criticized the country's policies in the West Bank.

"It is not fair that a Palestinian child cannot grow up in a state of her own, and lives with the presence of a foreign army that controls the movement of her parents. It is not just when settler violence against Palestinians goes unpunished," he said, adding later on that settlement construction is counterproductive to peace efforts.

On the first day of his visit, Obama said during a joint press conference with Israeli Prime Minister Benjamin Netanyahu that his main goal of the trip was to "hear and learn," he said, as well as to give Israelis a chance to know him.

He also talked extensively on the US' commitment to Israel's security and regional stability, and warned Iran that "all options are on the table" regarding Tehran's disputed nuclear program.

Syria was another main issue, as Obama said Washington was drawing a red line when it comes to the use of chemical weapons against civilians.

The final leg of Obama's regional trip is Jordan, which is fearful of a spillover of the conflict in neighboring Syria.

Obama and Jordan's king are expected to tackle Jordan's concern regarding Syrian refugees in the kingdom, where more than a quarter of a million of refugees are beginning to put a strain on the country's limited resources.