Heavily armed military troopers and law enforcement paraded through the streets of the Belgium capital early Saturday after the government sounded the alarm bell amid threats of a "Paris-style" act of terrorism.

According to Time, authorities are frantically searching for one of the suspects believed to have been involved in the Paris mayhem that left at least 129 dead and scores more injured after he was last seen crossing over into Belgium.

Prime Minister Charles Michel later declared the decision to raise the threat alert to its highest level was made "based on quite precise information about the risk of an attack like the one that happened in Paris ... where several individuals with arms and explosives launch actions, perhaps even in several places at the same time."

Meanwhile, Belgian authorities have reportedly taken possession of an assortment of weapons that were uncovered during the search of the home of one of three people arrested in connection with the Paris attacks.

Brussels was the home of Abdelhamid Abaaoud, the suspected organizer of the Nov. 13 Paris attacks, and Belgium has filed charges of "participation in terrorist attacks and participation in the activities of a terrorist organization" against three suspects relating to the Paris attacks.

The Belgian capital is home to more than one million citizens and also houses the headquarters of the European Union and the NATO alliance. Early Saturday, residents were being advised to avoid gatherings, train stations, airports and commercial districts.

"We urge the public not to give in to panic, to stay calm," said Michel. "We have taken the measures that are necessary." He added the said government's crisis cell is slated to meet again on Sunday.

In addition, French President Francois Hollande is planning to meet with British Prime Minister David Cameron on Monday morning in Paris to discuss how best to combat the Islamic State group in Syria and Iraq.