Nasrallah dropped a bombshell, Iranian fuel oil was bound for Lebanon.

Addressing a commemorative ceremony marking the Day of Ashura on Thursday, Hezbollah’s chief announced that the first of several ships loaded with fuel oil would sail from Iran to Lebanon within hours, warning the United States and Israel against targeting it.

The announcement sent the U.S. ambassador to Lebanon scrambling to find a way to prevent Lebanon from importing fuel from Iran. The ambassador, Dorothy Shea, rushed to speak with Lebanese President Michel Aoun hours after Nasrallah’s announcement.

Hezbollah, a close ally of Iran designated as a terrorist group by much of the West, is a major political force in Lebanon but its leaders are under US sanctions.