The men had entered Costa Rica from Panama on June 9 under an immigration control agreement that allows 100 people to enter the country daily.
U.S. President Barack Obama urged Russia and NATO allies to take all steps Tuesday to "discourage any escalation" after a Russian warplane was downed along Turkey's border with Syria. The incident has been denounced by Russian President Vladimir Putin as a "stab in the back."
The State Department often issues individual country travel alerts, but this notice was a rare "worldwide travel alert" that comes in the wake of a series of attacks.
PARIS -- France and Russia launched a punishing wave of attacks against Islamic State targets in Syria on Tuesday, as French leaders invoked an emergency pact to demand European allies join an intensifying military response to last week's terrorist carnage in Paris.
VIENNA – World powers meeting here on the Syria crisis agreed Saturday to push for political negotiations between opposition forces and representatives of the government of President Bashar Assad by Jan. 1, to be followed by an immediate, U.N.-monitored cease-fire.
PARIS – Decrying an "act of war," French President François Hollande warned on Saturday of a possible major escalation in the fight against the Islamic State after a bloody siege across Paris that killed at least 127 people, wounded hundreds more and sharply raised the terror threat confronting Europe.
Egypt said its security forces killed 12 people, including Mexican tourists, on Sunday after mistakenly targeting their four-vehicle convoy while chasing jihadists in the country's Western Desert.