Initial results of tests on victims of an attack which killed dozens of people in Syria’s Idlib province point to possible exposure to sarin gas, Turkey’s health ministry said on Thursday.

It said 31 people hurt in Tuesday’s attack were being treated in Turkish hospitals and three people had died since being brought from Syria.

“Based on the test results, evidence was detected in patients which leads one to think they were exposed to a chemical substance (sarin),” the statement said.

(Reporting by Ercan Gurses; Writing by Daren Butler; Editing by Nick Tattersall)