The United States and Persian Gulf partners imposed additional sanctions on Lebanon's Hezbollah leadership on Wednesday, targeting its top two officials, leader Hassan Nasrallah and his deputy, Naim Qassem.
The U.S. Treasury Department said four other individuals were also sanctioned, as was the Islamic State group in the Greater Sahara, which was designated as a foreign terrorist organization.
It was the third round of sanctions announced by Washington since the United States pulled out of the Iran nuclear deal last week.
Wednesday's sanctions targeted members of the primary decision-making body of Hezbollah, Treasury said in a statement.
"By targeting Hezbollah's Shura Council, our nations collectively rejected the false distinction between a so-called 'Political Wing' and Hezbollah's global terrorist plotting," Treasury Secretary Steven Mnuchin said.
The move expands U.S. sanctions against Nasrallah, who was sanctioned by Washington in 1995 for threatening to disrupt the Middle East peace process and again in 2012 over Syria. It is, however, the first time that the U.S. Treasury has acted against Qassem, who is being listed for his ties to Hezbollah.
The measures were imposed jointly by Washington and its partners in the Terrorist Financing and Targeting Center, which includes Saudi Arabia, Bahrain, Kuwait, Oman, Qatar and United Arab Emirates, it said.
The Gulf states targeted four of the movement's committees and ordered individuals' assets and bank accounts frozen.
A number of those targeted by the TFTC had been previously blacklisted by the United States.
Earlier on Wednesday, U.S. Secretary of State Mike Pompeo and his Qatari counterpart Sheikh Mohammed bin Abdulrahman Al Thani, discussed Qatar's efforts to counter the financing of terrorism, the State Department said.
Last year, Nasrallah dismissed the prospect of tougher U.S. sanctions against his group.
"The American administration, with all available and possible means, will not be able to damage the strength of the resistance," Nasrallah said on Aug. 13, 2017, in a televised address to mark the anniversary of the end of the 2006 Second Lebanon War.
Shiite Hezbollah and its political allies made significant gains in Lebanon's parliamentary election earlier this month, boosting an Iranian-backed movement fiercely opposed to Israel and underlining Tehran's growing regional clout.
The Trump administration has sought in recent days to choke off funding for Iran's overseas operations, including its backing for Hezbollah.
