On 14 April 2015, the U.S. Treasury Department blocked the assets of two key individuals associated with Yemen's Houthi rebels, also known as Ansar Allah. The designations were made pursuant to Executive Order 13611 of 16 May 2012, which authorises U.S. sanctions against those who directly or indirectly threaten the peace, security or stability of Yemen. Prior to the announcement, Abdul Malik al-Houthi, the leader of the Houthi movement, and key backer Ahmed Ali Saleh had been listed under UN Security Council Resolution 2140. alHouthi assumed leadership of the Houthi movement in 2004 after the passing of his brother, Hussein Badredden al-Houthi. Saleh, the son of former President Ali Abdullah Saleh, is a former commander of Yemen's Republican Guard and has used his access to munitions and influence within the Yemeni military to recruit new candidates to the rebel movement.