Belgium's foreign minister Didier Reynders told the ABC News that the country's primary concern right now is to find about 10 individuals whom Belgium authorities believe could launch a Paris-like attack with "heavy weapons" and "suicide bombs."

Reynders said the "heavy weapons" might be Kalashnikovs or "maybe more than that."

He also said intelligence seems to indicate that commercial centers and shopping malls are targets -- not schools or metros.

"The most important threat is on some...