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More held in Massoud death probe

BRUSSELS, Belgium (CNN) -- Belgian police have detained two more people in an investigation into the assassination of Ahmed Shah Massoud, the military leader of the Northern Alliance killed two days before the September 11 attacks.

The two men were taken into police custody on Monday night and are being interrogated, a spokesman for the prosecutor's office of the Belgian justice ministry said.

The arrests come after 12 people were detained earlier on Monday in Belgium and later released. Police have not ruled out the rearrest of some of them.

The two arrested most recently have not been charged and a magistrate is to determine whether there is sufficient evidence to charge them, the spokesman said.

They are being held in connection with the manufacture and possession of false documentation. The case is also connected to the false passports that were in the possession of the two men who were responsible for Massoud's killing.

Belgian police are investigating a cell that provided logistical support to two suicide bombers who, posing as journalists, detonated explosives hidden inside their camera as they interviewed Massoud on September 9 in Afghanistan. Massoud died a few days later.

The names of the people who had been detained have not been released. But sources close to the police have told CNN that some of the originally arrested are of Tunisian origin.

Authorities said two people were also detained in France on Monday -- one in Paris and one near Lille. There is a link between the arrests in Belgium and the arrest near Lille, however, the Belgian prosecutor's office will not confirm there was a connection with the Paris arrest.