Four people have been arrested in the French city of Montpellier on suspicion of plotting a terrorist attack in Paris.
In a raid conducted by anti-terror police, a 16-year-old girl and three other men aged 20, 26, and 33 were taken into custody in the city in southern France.
Explosives were reportedly found during a search of the flat, as well as a makeshift factory producing triacetone triperoxide, a potent explosive known as the 'mother of Satan' and used by Islamic State in the 2015 Paris attacks as well as the bombings in Brussels last year.
The authorities were watching the four suspects prior to the arrest, and made their move following the purchase of a key ingredient of the weapons, acetone.
Local media reports have said the group are suspected of planning a suicide bomb attack on a tourist area of the French capital.
France has remained on high terrorism alert following a series of high-profile attacks in the last three years.