PSG play Barcelona later in a Champions League soccer quarter-final to be viewed by millions around the world.

French police on Friday detained Algerian international Youcef Atal, who plays for Ligue 1 football side Nice, in a probe into suspected "justification of terrorism" after he published a social media post on the Israel-Hamas war, prosecutors said.

A man claiming allegiance to so-called Islamic State (IS) stabbed a French police commander to death before being killed when police stormed a house, officials have said.

Surviving Paris attacks suspect Salah Abdeslam chose not to blow himself up to save lives, his brother says.

French police are examining what appears to be a suicide bomb belt dumped on a Paris street, 10 days after the attacks that killed 130 people.

Belgian police have made 16 arrests in anti-terror raids but suspected Paris attacks gunman Salah Abdeslam remains at large, the authorities have said.

French police have carried out "more than 150" raids on suspected Islamists since the attacks on Paris, Prime Minister Manuel Valls says. They led to five arrests and the seizure of "an arsenal of weapons," including a rocket launcher, a Kalashnikov assault rifle, bulletproof vests, handguns and combat gear.