Iran vows to retaliate after US airstrikes amid escalating tensions

An Iranian-backed militia in Iraq has vowed to retaliate after US airstrikes killed at least 25 of its fighters and destroyed bases in an escalation of tensions between Tehran and Washington.Iran accused the United States of "an act of terrorism" over the attacks, even as Washington warned it was ready to launch more offensive action to defend its personnel and interests.F-15 war planes struck three targets linked to the Kataib Hezbollah militia in western Iraq and two across the border in Syria