"The EU has imposed an arms embargo and further targeted sanctions against a Houthi leader and the son of ex-President Saleh. This decision reflects UN Security Council resolution 2216 (2015) of 14 April 2015 and implements it for the EU," the European Council's statement said.
The two were accused of threatening the peace, security, and stability of Yemen and targeted with a travel ban and an asset freeze.
The ban also covers providing technical and financial assistance concerning military activities, according to the statement.
In December 2014, Saleh and two other senior Houthi military leaders became subject to European Union sanctions a month after the UN Security Council and the United States imposed restrictive measures on them.
Yemen has been in a state of civil war since 2014, when Houthi militants took control of large parts of the country, including the capital Sanaa, prompting President Abd Rabbuh Mansur Hadi to flee the country.
Earlier in 2015, supporters of former Yemeni President Saleh declared an alliance with the Houthis.