Iran has reduced its deliveries of crude oil to Syria since the lifting of sanctions. Refining data from the petroleum minister suggests Syria is getting crude from elsewhere – but the source is unclear.

Syria imported an average of almost 52,000 b/d of crude oil from Iran in 2015, but volumes have dwindled to an average of just 18,000 b/d since the end of February this year following the lifting of international sanctions on Iran in mid-January (MEES, 22 January).

Iran’s...