Anti-terrorism forces arrested four people Friday in southern France, including a 16-year-old girl, and uncovered a makeshift laboratory with the explosive TATP and other ingredients for fabricating a bomb. France's top security official said the raid thwarted an "imminent attack."
A police official said the teen had pledged loyalty to the Islamic State group in a recent video.
The prosecutor's office said around 70 grams (2.5 ounces) of TATP were seized in the Montpellier-area home of a 20-year-old man, along with a liter each of acetone, oxygenated water and sulfuric acid. TATP, which can be made from readily available materials, was used in the deadly November 2015 attacks in Paris and the March 2016 attack in Brussels carried out by Islamic State extremists.
Two other men were arrested, a 33-year-old and a 26-year-old, along with the teenage girl, according to the prosecutor's office, which handles terrorism investigations in France.
The police official, speaking on condition of anonymity to discuss the investigation, said one of the suspects was believed to be planning a suicide attack but that the investigation had not yet uncovered a specific target.
He said person in the group had tried to reach Syria in 2015 and was known to intelligence services. The group — notably the girl — attracted new attention with their social media postings, he said.
Interior Minister Bruno Le Roux said the arrests in three locations in the Montpellier area "thwarted an imminent attack on French soil."
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The country's prime minister praised the work of anti-terror investigators.
"Faced with the heightened threat, there has been an extremely strong mobilization of our intelligence services to ensure the French are protected to the utmost," Prime Minister Bernard Cazeneuve said.
France is still under a state of emergency after several deadly attacks in 2015 and 2016.
