France's first air strike on Daesh group in Syria killed at least 30 jihadists, including 12 child soldiers, a monitoring group said on Wednesday.

"The French air strike (on Sunday) on an Daesh training camp in eastern Syria killed at least 30 Daesh fighters including 12 from the 'Cubs of the Caliphate,'" said Rami Abdel Rahman of the Syrian Observatory for Human Rights.

Daesh calls its child soldiers "Cubs of the Caliphate".