On 30 December it was reported Reporting that the perpetrator was an ethnic Russian convert Change to Islam from the city of Volzhsk , in the Mari El Republic , by the name of Pavel Pechenkin , who changed Change his name to Ar-Rusi after conversion to Islam .

On 7 January some newspapers reported Reporting that Pechenkin was cleared from the accusation of being involved Cause_to_be_included with the bombing Attack .

Increasing Cause_change_of_position_on_a_scale the confusion , some newspapers mistakenly reported Reporting Pechenkin as responsible for the 30 December Volgograd explosion ( in the trolleybus ) .