The Pentagon said it was still assessing the results of the strike, which occurred within the past three days.
Authorities
believe Rachid Kassim inspired the killing of a French priest in the
town of Saint-Etienne-du-Rouvray in July and a failed gas canister
attack on Notre Dame Cathedral in Paris in September.
Kassim,
29, was previously based in Syria where officials have said he
stage-managed plots by radicals in France by communicating with them
through the encrypted Telegram messaging app. He was also linked to the
killing of a French police commander and his partner in Magnanville,
France.
French security sources told CNN in November that Kassim had been offline for weeks.
Mosul
is the site of pitched battles between Iraqi forces -- aided by
coalition forces -- and ISIS, which seized control of the large city in
2014. The coalition recently wrested the parts of the city east of the
Tigris River from ISIS control. Officials have said the fight for
control of the west side could drag into March.