ISIS gunman 'shoots dead shop worker' after taking hostages at French supermarket

A suspected ISIS gunman has killed a shop worker after taking hostages at a French supermarket following a drive-by shooting that injured an off-duty officer.

Shots were heard as the man stormed into a Super U at around 11.15am in the town of Trebes, south west France, screaming 'Allahu Akbar, I'll kill you all and 'vengeance for Syria'.

A butcher in the supermarket is believed to have been shot dead and another person is in a life-threatening condition.

Mayor Eric Menassi said the hostage-taker, said to be in his 30s. was now alone with one police officer in the supermarket and all other hostages had been freed.