The U.S. Treasury added three top Hezbollah figures to its list of sanctioned individuals on Tuesday, including two members of the Lebanese Parliament and a security official responsible for coordinating between Hezbollah and Lebanon’s security agencies.

The designations were part of U.S. efforts to counter the Iranian-backed Hezbollah’s “corrupting influence in Lebanon,” U.S. Secretary of State Mike Pompeo said in a statement.

It was the first time the U.S. Treasury’s Office of Foreign Assets Control had designated a member of Lebanon’s Parliament under a sanctions list targeting those accused of providing support to terrorist organizations. Washington has designated Hezbollah as a terrorist group.

Read more: Reuters