Palestinians were on Monday observing a general strike in solidarity with prisoners refusing food in Israeli jails for more than a month over their conditions.

Three Algerian naval officers were killed when their helicopter crashed after striking power lines during a night patrol southwest of Algiers, the defense ministry said Monday.

Iran's newly re-elected President Hassan Rouhani ridiculed U.S. strategy in the Middle East, dismissing Donald Trump's summit with Arab leaders as "just a show" and insisting that missile tests will continue.

"Our missiles are for our defense and for peace, they are not offensive. Know that while there is a technical need to conduct missile tests, we will do so and we will ask the permission of no one," Rouhani told reporters in Tehran. 

Donald Trump was on Monday to become the first serving U.S. president to visit the Western Wall, the holiest site where Jews can pray, located in Israeli-annexed east Jerusalem.

U.S. President Donald Trump on Sunday urged Islamic leaders to take a stand against violence done in the name of religion, describing the struggle against extremism as a "battle between good and evil."

The yawning gap between Tehran and Washington has grown even wider with U.S. President Donald Trump's latest efforts to isolate Iran, which accused the United States of "milking" Saudi Arabia for petro-dollars.

U.S. Secretary of State Rex Tillerson said Monday as President Donald Trump arrived in Israel that the trip was a chance to advance peace between Israelis and Palestinians.

Israeli ministers have approved measures aimed at improving the Palestinian economy and facilitating crossings, rare moves said to be at Donald Trump's request hours ahead of the US president's arrival.

US President Donald Trump spoke of a "rare opportunity" to bring stability to the region as he landed in Israel on Monday to seek ways to restart Israeli-Palestinian peace efforts.

Saudi Arabia's King Salman on Sunday accused regional rival Shiite Iran of exporting extremist Islamic movements to the world and vowed to eliminate the Islamic State group.