French authorities have shut down around 20 mosques and prayer halls considered to be preaching radical Islam since December, Interior Minister Bernard Cazeneuve said on Monday.
French President Francois Hollande defended his government from accusations it relaxed its anti-terror defences after the Euro championships, announcing further support for the fight against the Islamic State group.
Several dozen youth protesters clashed with police in the early hours of Friday in a central Paris square after refusing orders to disperse, police said.
Belgian police killed a gunman in a raid on a Brussels apartment linked to Islamist militants involved in November's Paris attacks, and two others were on the run, state broadcaster RTBF reported.
