A British delivery driver has been sentenced to at least 12 years in prison for a jihadi-inspired plot to attack American military personnel in England.

A judge said Junead Khan was a "committed supporter" of the Islamic State group and planned to kill air force personnel using a knife.

The 25-year-old's work for a pharmaceutical firm took him past U.S. air bases in eastern England, and prosecutors said he discussed ways of targeting them with an IS militant in Syria.

A jury convicted Khan last month. Passing sentence Friday at Kingston Crown Court, Judge Andrew Edis said Khan planned a "horrifying" murder "in order to create terror and terrorist propaganda in this country."

The judge handed down a life sentence with no chance of parole for at least 12 years.