Fort Hood gunman had told US military colleagues that infidels should have their throats cut

Yes, lethal indeed.

Major Nidal Malik Hasan, the gunman who killed 13 at America's Fort Hood military base, once gave a lecture to other doctors in which he said non-believers should be beheaded and have boiling oil poured down their throats.

He also told colleagues at America's top military hospital that non-Muslims were infidels condemned to hell who should be set on fire. The outburst came during an hour-long talk Hasan, an Army psychiatrist, gave on the Koran in front of dozens of other doctors at Walter Reed Army Medical Centre in Washington DC, where he worked for six years before arriving at Fort Hood in July.

Colleagues had expected a discussion on a medical issue but were instead given an extremist interpretation of the Koran, which Hasan appeared to believe.

One Army doctor who knew him said a fear of appearing discriminatory against a Muslim soldier had stopped fellow officers from filing formal complaints.