The U.S. Treasury is putting two members of the Somali insurgent group al-Shabab on a terrorist blacklist.
The move against Omar Hammami and Hassan Mahat Omar would freeze any assets they hold in the United States and lock them out of the U.S. financial system.
Hammami is a U.S. citizen known as Abu Mansur al-Amriki. He is among foreign fighters in Somalia that U.S. military officials have said they would like to see killed or captured.
The Treasury Department said that Omar is Kenyan.