VERVIERS, Belgium — With Europe dreading more terror, Belgian authorities moved swiftly to pre-empt what they called a major attack by as little as hours Thursday, killing two suspects in a firefight and arresting a third in a vast anti-terrorism sweep that stretched into the night.
The police raid on a former bakery in this provincial rust belt town was another palpable sign that terror had seeped deep into Europe’s heartland as security forces struck against returnees from Islamic holy war in Syria.
“You could smell the gunpowder,” said neighbor Alexandre Massaux following a minutes-long firefight with automatic weapons and Kalashnikovs that was also punctuated by explosions.
Two suspects were killed and a third arrested and charged with belonging to a terrorist organization.
“As soon as they thought special forces were there, they opened fire,” federal magistrate Eric Van der Sypt said.
After the gun smoke lifted, police continued with searches in Verviers and the greater Brussels area, seeking more clues in a weekslong investigation that started well before the terrorism spree last week that led to 17 deaths in the Paris area. The Belgian operations had no apparent link to the terrorist acts committed in France.
And, unlike the Paris terrorists, who attacked the office of a satirical newspaper and a kosher grocery store, the suspects in Belgium were reportedly aiming at hard targets: police installations.
“They were on the verge of committing important terror attacks,” Van der Sypt told a news conference in Brussels.
Across Europe, anxiety has grown as the manhunt continues for potential accomplices of the three Paris terrorists, all of whom were shot dead by French police. Authorities in Belgium signaled they were ready for more trouble by raising the national terror alert level from 2 to 3, the second-highest level.
“It shows we have to be extremely careful,” Van der Sypt said. The Verviers suspects “were extremely well-armed men” equipped with automatic weapons, he said. Authorities have previously said 300 Belgian residents have gone to fight with extremist Islamic formations in Syria; it is unclear how many have returned.
Prime Minister Charles Michel said the increase in the threat level was “a choice for prudence.”
“There is no concrete or specific knowledge of new elements of threat,” he said.
The suspects in Verviers opened fire on police when they closed in on them near the city’s train station, the magistrate told reporters. There was an intense firefight for several minutes. Video posted online showed a dark view of a building amid blasts, gunshots and sirens, and a fire with smoke billowing up.
No police were wounded or killed in the clash, which occurred at the height of rush hour in a crowded neighborhood of this former industrial town of 56,000 about 80 miles southeast of the capital, Brussels.
Earlier Thursday, Belgian authorities said they were looking into possible links between a man they arrested in the southern city of Charleroi for illegal trade in weapons and Amedy Coulibaly, who killed four people in a Paris kosher market last week.
The man arrested in Belgium “claims that he wanted to buy a car from the wife of Coulibaly,” Van der Sypt said. “At this moment this is the only link between what happened in Paris.”