Coalition air strikes have killed 10 Islamic State leaders over the past month, including several linked to the Paris attacks or other plots against the West, a US military official in Iraq said.
They were killed mainly by drone strikes in Iraq and Syria, US army Colonel Steve Warren said.
He offered few details but said at least two of those killed were linked to the Paris attacks.
He said one was directly tied to those who planned the violence in Paris and was actively planning other assaults against the West. Most appeared to be mid-level leaders.
Col Warren said that one of the others killed was from Bangladesh but spent time in Britain and was a hacker for IS and co-ordinated anti-surveillance technology.