Police officers gather at the scene of an anti-terrorism operation in Verviers, Belgium, on Thursday, January 15. Two people were killed during a raid on a suspected terror cell, Belgian authorities said. A third suspect was injured and taken into custody.JULIEN WARNAND/EPA
Police block a street in Verviers.
Police officers work in Verviers after the raid.Bruno Fahy/AFP/Getty Images
Police set a large security perimeter in the center of Verviers. A senior Belgian counterterrorism official told CNN that the alleged terror cell is believed to have received instructions from ISIS.BRUNO FAHY/AFP/Getty Images
The trio targeted in the raid had been under surveillance for some time, prosecutor's spokesman Thierry Werts told reporters.BRUNO FAHY/AFP/Getty Images
Verviers is about 69 miles (111 kilometers) east-southeast of Brussels.BRUNO FAHY/AFP/Getty Images
CNN affiliate VTM reported that the terrorism investigation started weeks ago.BRUNO FAHY/AFP/Getty Images