French experts have concluded that sarin gas was used in a deadly attack on a rebel town in Syria this month and blamed the regime of Syrian President Bashar al-Assad, French Foreign Minister Jean-Marc Ayrault said in Paris yesterday. “The use of sarin is without question. The responsibility of the Syrian regime is also without question,” Ayrault said in presenting the experts’ findings. The April 4 attack on Khan Sheikhoun in Syria’s north-western province of Idlib killed at least 87 people, according to the Syrian Observatory for Human Rights, a monitoring group. The United States, Britain, Turkey and the Organisation for the Prohibition of Chemical Weapons have also said the toxic nerve agent sarin was used in the airstrike.