The memorandum of understanding (MOU) signed last week, committed Iran to using its 'best efforts for the safe passage of commercial vessels with no charge for 60 days.'

The developments come during a fragile time for the US and Iran as they work to negotiate a permanent end to the war.

Tit-for-tat attacks threaten the fragile agreement between DC and Tehran

The strikes mark the worst escalation since the US and Iran signed an interim peace deal two weeks ago.