Nikolic also condoled with the bereaved families of the victims on his and Serbian nation's behalf.
Furthermore, he wished recovery for the injured, IRNA reported.
The Plasco Trade Center in Tehran's Jomhouri Street caught fire on Thursday, January 19, and after firefighters' four-hour efforts to contain the blaze, suddenly collapsed vertically.
According to officials, a number of firefighters are trapped under the debris and rubble and no report is yet available on their fate.
EghtesadOnline: Serbian President, Tomislav Nikolić, on Friday condoled President Hassan Rouhani on Plasco Trade Center inferno and fall, which killed or injured a number of the citizens of the capital.