Syria's opposition said Wednesday it had launched an investigation into the deaths of 15 children i**culated against measles in the **rthwestern province of Idlib. The opposition said it had set up a team bringing together health and justice officials to establish "the circumstances of this human tragedy." In a statement, the opposition justice ministry an**unced the creation of a commission of inquiry "aimed at establishing the circumstances around the accident, to determine the real causes... and to take the necessary judicial procedures." The Syrian Observatory for Human Rights, a monitoring group, said medical sources had suggested that the vaccines could have been compromised, either because they were expired or poorly stored, but there was ** immediate confirmation of their claims. The opposition's health ministry said the affected children started showing symptoms "half an hour after in**culation. Syria's war has caused more than half of the population to flee their homes and millions of children are among the displaced, both inside and outside the country.