Witness says blaze takes place near or at Tabriz thermal power plant, but local media says site is cellophane factory; incident comes after morning blast at another power station

Power station located in same province as Natanz nuclear facility, which was damaged in July 2 blast blamed on Israel

Large fire rages at scene of incident in south of nation; no reports of casualties

Middle East's biggest petroleum exporter says blasts near oil tankers, pipeline aimed at global economy