Brussels terror threat: Special forces arrest four people after warnings of 'imminent threat'
Brussels has raised its terrorism alert to its highest level, suspending its underground and deploying armed security forces to patrol the city.
The government's crisis centre raised the alert to 'Level Four', indicating a "serious and immediate threat", amid a reports that police had found a cache of weapons and ammunition during a raid on an apartment in Molenbeek, the poor suburb of Brussels that was home to the suspected mastermind of the Paris attacks that killed 130 people.
The Belgian Federal Prosecutor's office later confirmed the discovery in the home of one of three people arrested in Belgium in connection with the Paris attacks.
In a written statement the office said no explosives or suicide bomb belt had been found in the search. The Belgian paper Dernière Heure reported that chemicals had also been found in a raid in Molenbeek, but this was not confirmed by the prosecutor.
Special forces arrested four people at around 3pm on the Place du Grand Sablon, Belgium media reported.
Earlier, Belgium's Prime Minister Charles Michel said the terror alert had been raised "based on quite precise information about the risk of an attack like the one that happened in Paris".
At least one suspect from the deadly Paris attacks is at large and was last seen crossing into Belgium.
Authorities across Europe, the Middle East and the US are trying to determine how a network of primarily French and Belgian attackers with links to Islamic extremists in Syria plotted and carried out the deadliest violence in France in decades - and how many may still be on the run.
A new potential link emerged on Saturday in Turkey, where authorities said they detained a 26-year-old Belgian suspected of connections to Islamic extremists - and possibly to the Paris attacks.
Belgium's national Crisis Centre had raised its terrorism alert for the Brussels region to Level 4, which indicates a "serious and immediate threat". Belgium's special security cabinet held an emergency meeting on Saturday morning.
Brussels was home to the suspected organiser of the November 13 Paris attacks, Abdelhamid Abaaoud, and Belgium has filed charges of "participation in terrorist attacks and participation in the activities of a terrorist organisation" against three suspects relating to the Paris attacks.
At least one Paris attacker, Salah Abdeslam, crossed into Belgium the morning after the attacks. A Paris police official and the Paris prosecutor's office said on Saturday they had no firm information on Abdeslam's whereabouts, including whether he was in the Brussels area.
Heavily armed police and soldiers patrolled on Saturday morning at key intersections of the Belgian capital, a city of more than one million that is home to the headquarters of the European Union, the Nato alliance and offices of many multinational corporations.
Residents were recommended to avoid gatherings, train stations, airports and commercial districts. Service was halted on the Brussels Metro, as well as on streetcar lines that run underground.
The prime minister, speaking at a news conference after the emergency government meeting, said: "We urge the public not to give in to panic, to stay calm. We have taken the measures that are necessary."
He said that the government's crisis cell will meet again on Sunday afternoon to reassess the threat.
In Turkey, authorities detained three suspected Islamic State militants, including a 26-year-old Belgian of Moroccan descent.
The state-run Anadolu Agency said that the two Syrians and the Belgian national - identified as Ahmet D - were detained near the Turkish coastal city of Antalya.
The private Dogan news agency identified the Belgian as Ahmet Dahmani and said he is suspected of having explored areas in Paris that were targeted in the attacks.
A Paris police official said that he had no information about Dahmani or his possible visit to the attack sites. The Paris prosecutor's office said it had no information to communicate about Dahmani.
Concerns about Europe's porous borders prompted interior and justice ministers meeting in Brussels on Friday to promise tightened border controls to make it easier to track the movements of jihadis with European passports travelling to and from warzones in Syria.
Prosecutors said that they had determined through fingerprint checks that two of the seven attackers who died in the bloodshed on November 13 had entered Europe through Greece, an entry point for many of the hundreds of thousands of migrants seeking asylum in Europe.
The five other attackers who died had links to France and Belgium. One of the seven dead has not been identified, while a manhunt is under way for one suspect who escaped, 26-year-old Abdeslam. French police stopped Abdeslam the morning after Friday's attacks at the Belgian border but then let him go. His brother Brahim blew himself up in the Paris attacks.
Abaaoud was killed in a raid on Wednesday at an apartment in the Paris suburb of Saint-Denis.
Marking a week since the carnage, some Parisians lit candles and paid tribute on Friday night to the victims with silent reflection. Others decided that enjoying themselves was the best way to defy the extremists. They sang and danced on Place de la Republique, in the heart of a trendy neighbourhood where scores of people were killed, most of them in the attack on the Bataclan concert hall.
France's parliament has extended a state of emergency for three months, expanding police powers to carry out arrests and searches and allowing authorities to forbid the movement of persons and vehicles at specific times and places.
French president Francois Hollande is also going to Washington and Moscow next week to push for a stronger international coalition against IS.
The Belgian Federal Prosecutor's office said several weapons were discovered during a search of the home of one of three people arrested in Belgium in connection with the Paris attacks.
In a written statement, the office said no explosives or suicide bomb belt had been found. It said additional details would not be made public.
A senior government official said Turkish authorities have detained a Belgian national of Moroccan origin who is believed to have been in contact with the Paris attackers.
The official said 26-year-old Ahmad Dahmani was detained in a luxury hotel in Antalya along with two other suspects.
He said the three - suspected IS militants - remained in custody following a court appearance.
The official said: "We believe that Dahmani was in contact with the terrorists who perpetrated the Paris attacks. The investigation continues."
Dahmani had arrived in Turkey from Amsterdam on November 14, the official said. The three were preparing to cross the Turkish-Syrian border.
Paris police extended a ban on demonstrations and other gatherings in the region through until November 30.
The French capital's police department issued a statement saying the ban is being extended because of "the current context", including a nationwide state of emergency that has been extended for three months.
The department noted extra security concerns around the arrival of more than 100 heads of state for the UN climate conference that starts in a week. A march by environmental groups scheduled for November 29 has been cancelled.
Police are requiring all major concert venues to install special security measures.
Independent News Service