PARIS - French authorities on Tuesday questioned a top suspect linked to attackers who terrorized Paris, while Belgium's capital remained locked down under threat of a possible similar attack.

Jawad Bendaoud, the only person in France known to be facing potential terrorism charges directly linked to the Nov. 13 Paris attacks that killed 130 people and wounded hundreds, was handed over Tuesday morning to an antiterrorism judge in Paris, according to a judicial official.

Bendaoud was detained last week for providing lodging to the suspected mastermind of the attacks, which were claimed by Islamic State, in an apartment in the Paris suburb of Saint-Denis.

Police raided the apartment Nov. 18, and three people were killed - suspected attacks orchestrator Abdelhamid Abaaoud, a female cousin, and one other.

Bendaoud acknowledged in a TV interview giving shelter to two people from Belgium, but said he didn't know who they were or what they planned.

"I didn't know they were terrorists. I was asked to do a favor. I did a favor, sir," the 29-year-old told BFM television.

He was to be either charged or released Tuesday.

French Interior Minister Bernard Cazeneuve told lawmakers Tuesday that 124 people have been handed preliminary charges since a state of emergency was imposed hours after the attacks, following more than 1,230 searches in which 230 weapons were recovered. But he did not specify what the charges were or whether they were linked to the attacks.

In Belgium, authorities charged a fifth suspect with terror-related offenses relating to the Paris attack, which have been traced to a network of people with ties to France and Belgium.

The Belgian federal prosecutor's office on Tuesday also issued an international warrant for Mohamed Abrini, who is being tracked by Belgian and French police. Abrini was seen with fugitive Salah Abdeslam at a gasoline station in Ressons on the highway to Paris two days before the attacks.

Brussels remained at its highest alert level Tuesday, after Belgian Prime Minister Charles Michel cited a "serious and imminent threat" to the city, which houses the headquarters of the European Union and NATO.

Belgium's crisis center said the alert level would change only if a significant breakthrough warranted it.

Increased security measures in the wake of the massacre in Paris have virtually shut down the Belgian capital, with the subway system, many shops, and schools remaining shut. Michel said that despite the continued high alert, schools would reopen on Wednesday.

Businesses in Brussels were starting to feel the pain, and while few question the government's need to protect the public from a potential attack, some shop owners said the shutdown was too extreme.

"It's not a very good decision," said Esther Willems, assistant manager at the Galler chocolate shop in the heart of Brussels' city center. "In the last two days, we have only had about 10, 11 clients," compared with about 100 normally.

Meanwhile, France's security chiefs held a meeting Tuesday about protection for next year's European soccer championships, being hosted in cities around France.

Also Tuesday, French police released a photo of a dog killed in the Saint-Denis apartment siege, a 7-year-old Belgian Malinois named Diesel. The National Police said Diesel, a SWAT team assault dog, was "killed by terrorists."