The 27 ambassadors to the EU decided to reinforce the existing arms embargo in particular.
The new measures allow European countries to carry out inspections on ships and aeroplanes carrying "suspect" cargoes in their airports, ports and territorial waters, in compliance with international norms. They also target a further 26 individuals and several other organisations providing financial support in particular to the regime of President Bashar Al Assad.
The asset freeze and visa ban will come into force on July 24, following publication of the measures in the Official Journal of the EU. The EU blacklist already includes 129 people and 49 organisations, including the Syrian defence minister and intelligence chief who were both killed in recent attacks.