The head of Syria's main opposition coalition, Ahmed al-Jarba, urges allies for a "strong response" to Bashar al-Assad's regime after last week's alleged chemical weapons attack, dpa reported.
"This crime will not go unpunished," al-Jarba says in Paris, where he was meeting President Francois Hollande.
"There must be a strong response by the United Nations and international allies of the Syrian people."