Another four nonwhite invader terrorists—including an Algerian, two Turks, and a woman—have been arrested for planning an attack in the French capital, police in Paris have announced.

The four nonwhites were arrested during several police swoops in the north of Paris for “plans to undertake violent actions.”

The Algerian, identified as E. Youssef, was already well known to police and had been sentenced to five years in prison in March 2014 after being arrested two years earlier when he tried to leave France for Syria.

He was released from prison in October last year and had been under house arrest since February 29 under the special provisions of France’s state of emergency—which came into force after last year’s terrorist attacks in Paris.

Youssef was arrested with the female in Seine-Saint-Denis on the northeast edge of Paris. The two Turks, named as Aytac and Ercan B., were arrested at the same time in a northern arrondissement.

French media reported that police seized computer equipment and an unused cartridge for an AK-47.

They were arrested after a preliminary investigation by the Paris prosecutor’s office on February 17, and assigned to the Directorate General of Internal Security (IMSD).

According to the police, the four suspects had become a serious threat and the investigation has established that at least one member of the team was about to commit an attack in Paris.

* Meanwhile, police in Belgium have continued their hunt for two other nonwhites who fled a Brussels flat after a shootout in the Brussels neighborhood of Forest on Tuesday during a raid linked to November’s Paris attacks.

The one nonwhite shot dead in the raid has been identified as Mohamed Belkaïd, a 35-year-old Algerian living illegally in Belgium.

He was shot dead by a police sniper as he prepared to fire at officers from a window.

“Next to his body was a Kalashnikov, a book on Salafism, and an Islamic State flag,” said Thierry Werts, of the Belgian federal prosecutor’s office. The flat also contained a large cache of ammunition. Belkaïd had previously only been known to police for a case of theft in 2014.

Belgian officials said that since the Paris attacks in November 2015, a further 58 nonwhite invader-terrorists had been arrested in the direct investigation and another 23 arrested in related inquiries.