Stockholm, July 2 : The restart of a Swedish nuclear reactor which was due to be operational by the end of June following maintenance work has been postponed by three more weeks, media reported.

The Ringhals 3 reactor will instead restart on July 19, Johan Pettersson, a spokesperson for the electricity company Vattenfall, which owns and operates the Ringhals nuclear power plant, told Swedish Television (SVT) on Saturday.

"At the end of the maintenance period, another task was added," Pettersson said.