As the two powers vie for influence over the civil wars in Yemen and Syria and regional dominance, Tehran and Riyadh have begun using cyber attacks.
Christians had until Eid al-Fitr, the festival at the end of the holy month of Ramadan, to leave, the message reportedly said.
The flotilla is part of a series of protests against Israel's nine-year blockade of Hamas-dominated Gaza.
European Union foreign policy chief Federica Mogherini said, however, that tough days lay ahead as a self-imposed June 30 deadline nears.
Israel's economy minister says he backs a plan for the country to rebuild Gaza in exchange for a long-term ceasefire agreement with Hamas.
With a self-imposed deadline approaching on Tuesday, both sides emphasized that major obstacles remained to finalizing a deal.
A broad coalition of U.S. Jewish groups is expressing support this weekend for America's black community following the mass shooting in Charleston, South Carolina.
The Vatican signed its first treaty with Palestine on Friday, officially recognizing the state in hopes the recognition would spur Israel to work with Palestine to forge a two-state solution.
Israel has taken a hard line against Eritrean migrants seeking asylum there, according to Human Rights Watch.
Five hundred had planned to cross into Israel Thursday and Friday so they could attend Ramadan prayers in Jerusalem.
A survey found wide support for the U.S.-led airstrikes against ISIS but many remain critical of American interrogation methods.
According to leaked documents available through WikiLeaks, Iran shipped nuclear equipment including centrifuges to Sudan in 2012.
The actor receives the Genesis Prize, accompanied by wife Catherine Zeta-Jones and their children, Dylan and Carys.
The U.N. says both Israel and Palestinian factions may have committed war crimes, igniting anew an old fear in Israel.
The U.N. says both Israel and Palestine may be guilty of war crimes in Gaza. Israel says the U.N. has a lot to answer for.
Last summer's war in Gaza left 2,251 Palestinians and 73 Israelis dead, and now the U.N. is accusing both parties of war crimes.
"No doubt racism has no connection to brains," a follower tweeted back.
The flotilla, which consists of at least three boats carrying pro-Palestinian activists, is expected to arrive in Gaza before the month's end.
Israel has largely stayed away from the Syrian war, but now the war is coming closer.
Daniel Shapiro slams Michael Oren for blaming President Barack Obama for strained US-Israeli relations.
The unity government has failed to unite the rival Palestinian factions Fatah and Hamas, slowing down reconstruction work in the war-torn Gaza Strip.
The reality TV star marks her daughter's second birthday Monday by remembering a special day in April in Jerusalem.