IRNA � The Police have detected no sign of attempt behind the tragedy of the collapse of Plasco Trade Center in the Iranian capital on Thursday, according to Police chief Brigadier General, Hossein Ashtari.

Speaking to reporters on Wednesday, Ashtari said the Police have taken all the necessary measures to establish security since the incident occurred.

He said looking into causes of the tragic incident will be on the agenda of the police after the debris removing operation is finished.

The 17-storey Plasco Trade Center collapsed in Tehran on Thursday, January 19, while the firefighters were trying to extinguish the fire in the building.