Deadly Israeli attacks that blew up Hezbollah radios and pagers crossed all red lines, the leader of the heavily armed Iran-backed Lebanese movement said on Thursday, as the United States called for restraint and urgent de-escalation.

Israel has not claimed responsibility for the operation, but Hezbollah laid the blame squarely on its adversary, and two U.S. officials told NBC News that Israel was behind the attack. From Russia to Jordan,

A source says more handheld devices exploded in Lebanon a day after thousands of pagers carried by Hezbollah members blew up in an attack blamed on Israel.