Kenya police: 3,000 arrested after terror attacks; rights groups criticize the method

A Kenyan official says at least 3,000 people have been arrested during four days of security operations following a wave of terror attacks.

Police spokesman Masoud Mwinyi said Tuesday that most of those arrested were scrutinized by security agencies and released, but that 447 are being held in custody under anti-terrorism laws that allow police to hold suspects longer than 24 hours.

Human rights activists have criticized the operation, saying only Somalis are being targeted. Rights groups are also concerned about police treatment of suspects.

Kenya has suffered a wave of recent explosive and gun attacks blamed on a Somali militant group. Al-Shabab militants have vowed to carry out terror attacks in Kenya to avenge the presence of the Kenyan military in Somalia fighting the insurgents.