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,

Thousands of people were wounded when Hezbollah members' pagers exploded in the Iran-backed group's Beirut and south Lebanon strongholds.