Sent_en: 2fil Unconfirmed reports also claim the Federal Security Service was searching for three people ahead of the attack and that the bomber was Vitaly Razdobudko of Stavropol.
Sent_yy: Isinaad din ng mga hindi pa nakukumpirmang ulat na ang Federal Security Service ay naghahanap ng tatlong tao bago pa ang pag-atake at ang taong nagpasabog ay si Vitaly Razdobudko ng Stavropol.