Two suspects held in Belgium over 'New Year plot'

The federal prosecutor's office in Brussels, the home of the European Union, said police seized military-style uniforms and Islamic State propaganda in the raids on Sunday and Monday.

Investigators said the police action was not linked to the wave of deadly attacks in Paris in November which France says were prepared in Belgium.

One of the two suspects was arrested on suspicion of planning attacks as well as "playing a lead role in the activities of a terrorist group and recruiting for terrorist acts," the prosecutor's office said in a statement. 

The second faced charges of planning and "participating in the activities of a terrorist group," it said.

"The investigation cast a light on serious threats of attacks believed to be aimed at several emblematic sites in Brussels and which would be carried out during the end-of-year celebrations."

The suspects were arrested during raids in the Brussels area, in Flemish Brabant and near the southern French-speaking city of Liege.

The raids were ordered by an investigating magistrate in Brussels who specialises in terrorism cases.

A total of six people were detained, including the two suspected of plotting attacks. Four were later released, the prosecutor's office said.

The raids turned up neither weapons nor explosives, but investigators found computer hardware, military-style training uniforms and Islamic State propaganda material, prosecutors said.

The Belgian authorities are still looking for suspects linked to the 13 November attacks on a Paris concert hall, restaurants, bars and the national stadium which left 130 people dead.

French police have used national state of emergency powers to conduct 2,700 raids and place 360 people under house arrest since the Islamic State group's attacks in November.

A worldwide search has been underway for Salah Abdeslam, 26, who is thought to have been the driver of a black Renault Clio that dropped off three suicide bombers near the Stade de France the night of 13 November.

Earlier this month, news reports revealed that Belgian police had waited hours to search a house for Abdeslam because of a law that prevented such searches between 9 pm and 5 am.

Investigation of the Charlie Hebdo attacks carried out in January have also been continuing. 

The Paris prosecutor's office told the AP news agency this month that those held were arrested on suspicion of helping provide guns to Amedy Coulibaly, the man who killed four people in a kosher supermarket in January in the aftermath of the Charlie Hebdo attack.

The AFP said the prosecutor's office named one of those arrested as Claude Hermant, 52, and said he had links to a far-right organisation. He was charged with arms trafficking earlier this year.

Investigators believe an assault rifle and four Tokarev hand guns found in the arsenal of Coulibaly may have been sourced from Hermant.

A total of seven people have been charged with providing weapons or vehicles to Coulibaly. All deny any knowledge he was planning an attack.

Seventeen people died in three days of attacks around Paris carried out by Coulibaly and brothers Said and Cherif Kouachi. The three attackers were killed by police on 9 January.