On Thursday, seven searches took place in several municipalities of the Brussels-Capital Region and in the Sint-Pieters-Leeuw municipality in the province of Flemish Brabant, according to the local authorities. Based on the searches results, the prosecutors announced the arrest for questioning of six people. Three of them were released on the same day, while another three remained in custody up to Friday.
"Within the framework of an investigation in Brussels into the threats of terrorist attacks, with key places of the capital among the possible targets, the last three of the detainees were released after questioning," the country’s federal prosecutor’s office said in a statement.
The high threat of terror attack also prompted Brussels authorities on Wednesday to cancel the New Year's Eve fireworks planned to be held in the center of the city.