Europe

Dozens of raids, 12 arrests in Belgian anti-terror raid

  • Members of the bomb squad arrive at Antwerp Central train station in Antwerp, Belgium on Saturday, June 18, 2016. Police and the bomb squad unit responded to a suspect package in the Antwerp station while the Belgian federal prosecutor's office said early Saturday that homes and car ports were searched in 16 municipalities, mostly in and around Brussels in an anti-terror sweep. (AP Photo/Virginia Mayo)

    Members of the bomb squad arrive at Antwerp Central train station in Antwerp, Belgium on Saturday, June 18, 2016. Police and the bomb squad unit responded to a suspect package in the Antwerp station while the Belgian federal prosecutor's office said early Saturday that homes and car ports were searched in 16 municipalities, mostly in and around Brussels in an anti-terror sweep. (AP Photo/Virginia Mayo)  (The Associated Press)

  • Members of the bomb squad arrive at Antwerp Central train station in Antwerp, Belgium on Saturday, June 18, 2016. Police and the bomb squad unit responded to a suspect package in the Antwerp station while the Belgian federal prosecutor's office said early Saturday that homes and car ports were searched in 16 municipalities, mostly in and around Brussels in an anti-terror sweep. (AP Photo/Virginia Mayo)

    Members of the bomb squad arrive at Antwerp Central train station in Antwerp, Belgium on Saturday, June 18, 2016. Police and the bomb squad unit responded to a suspect package in the Antwerp station while the Belgian federal prosecutor's office said early Saturday that homes and car ports were searched in 16 municipalities, mostly in and around Brussels in an anti-terror sweep. (AP Photo/Virginia Mayo)  (The Associated Press)

  • A man walks past police guarding a cordon at Antwerp Central train station in Antwerp, Belgium on Saturday, June 18, 2016. Police and the bomb squad unit responded to a suspect package in the Antwerp station while the Belgian federal prosecutor's office said early Saturday that homes and car ports were searched in 16 municipalities, mostly in and around Brussels in an anti-terror sweep. (AP Photo/Virginia Mayo)

    A man walks past police guarding a cordon at Antwerp Central train station in Antwerp, Belgium on Saturday, June 18, 2016. Police and the bomb squad unit responded to a suspect package in the Antwerp station while the Belgian federal prosecutor's office said early Saturday that homes and car ports were searched in 16 municipalities, mostly in and around Brussels in an anti-terror sweep. (AP Photo/Virginia Mayo)  (The Associated Press)

Authorities have raided dozens of homes and arrested 12 suspects in a major anti-terror investigation which they say required "immediate intervention."

The federal prosecutor's office said early Saturday homes and car ports were searched in 16 municipalities, mostly in and around Brussels.

The statement said 40 people were taken for interrogation, of which 12 were arrested. It said there were no major incidents during the raids.

The operation comes as Belgium is still under the second highest terror alert in wake of the March 22 attacks on the Brussels subway and airport which left 32 people dead.