An explosion which could be heard within the grounds of Soccer City this afternoon was caused by a man-made blast at a nearby mine, a spokesman for the World Cup's local organising committee said.
Brazil and the Ivory Coast are due to kick-off at the Johannesburg stadium at 7.30pm UK time, and there was initially confusion surrounding the cause of the blast.
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Journalists in the media centre and officials at the ground heard the blast, but the LOC communications chief, Rich Mkhondo, insisted there was nothing to be concerned about.
"This explosion was just part of a normal mining operation. We have checked with the police and they said it was completely normal," he said.
Mkhondo added that there were a number of mines within a few kilometres of the stadium.
The South African Police Service issued a statement on the blast which read: "The explosion heard and felt on the West Rand today was nothing more than a controlled explosion by a registered local manufacturer of explosives, testing new products.
"There was absolutely no damage or injuries, as the explosion was done under strict supervision by the company's representatives, kilometres away from the Soccer City Stadium, where preparations for the Group G game between Brazil and Ivory Coast are proceeding as normal."