The European Union has imposed a ban on purchases of Syrian oil and targeted three Syrian firms in an expanded sanctions list meant to intensify pressure on President Bashar al-Assad's government.
The new round of sanctions against Syria marks the first time Europe has targeted Syrian industry as it seeks to cut off Mr Assad's access to funds and force him to end a five-month-old crackdown on pro-democracy protesters.
The United Nations says the crackdown has killed more than 2,000 civilians.
But analysts say the sanctions, which do not go as far as the investment ban imposed by the United States last month, may have only a limited impact on the president’s access to funds.
EU governments are expected to have more discussions on such a ban, but industry experts have said the 27-member bloc will have to overcome reluctance among some capitals, given that European firms like Anglo-Dutch Royal Dutch Shell and France's Total are significant investors in Syria.
The new sanctions target Syria's Real Estate Bank, which provides mortgage finance, as well as Mada Transport and Cham Investment Group, two arms of a Syrian investment firm which the EU says provides funds to Assad's government, according to the EU's Official Journal.
Four Syrian businessmen were also added to a list of people affected by EU asset freezes and travel bans.
Underscoring divisions in Europe over energy sanctions which have slowed the implementation of economic measures against Mr Assad, Italy has won an exemption on contracts agreed before the new sanctions round, which can be fulfilled until 15 November.
Russian Foreign Minister Sergei Lavrov condemned European sanctions saying they "will lead to nothing good".
Finnish Foreign Minister Erkki Tuomioja, speaking in a Polish seaside resort where EU foreign ministers met to hold informal policy talks, said any further delays would blunt the impact of sanctions.