Jean-Baptiste Salvaing a captain with the judicial police at nearby Mureaux was stabbed repeatedly in the throat and stomach at his home in Magnanville on the outskirts of Paris last night.

The 42-year-old's wife then died during a police operation as officers tried to rescue her from 25-year-old terrorist Larossi Abballa.

The knife-wielding killer lived locally and was a convicted Islamic extremist, who was sentenced to three years in 2013 for "association with criminals preparing terrorist acts".