The OR Tambo International Airport, outside Johannesburg, was experiencing flight delays on Thursday due to a power outage, it said.
Copper Theft Increases: Sacci
According to the Sacci Copper Theft Barometer, copper theft stood R9m in May and R9.9m in April.
Sacci said the June increase was the first since September 2012.
The increase was 38 percent lower than a year before, indicating a long-term decrease in the level of copper theft.
The Copper Theft Volume Indicator increased to a level of 158 metric tons in June from 132 metric tons in May.
The international spot price of copper dropped to a monthly average, to date, of US6919 (about R67,875) per metric ton in July 2013, from US7003 (about R68,699) in June and US7237 (about R70,994) in May.
This was 8.8 percent lower than a year before and the first time the average monthly price had breached the US7000 (about R68,670) level in almost two years.
Copper waste exports increased to US36.8m (about R361m) in February, from US35.1m (about R344m) in January.
The February figure was 15 percent less than a year before.
Sacci CEO Neren Rau said the outlook on copper theft remained positive over the short to medium-term despite the "unfortunate increase in June".
He said this was due to the downward trend in the international copper price.
"Although there is a relationship between the copper price and theft levels, it is not perfectly correlated. Short-term structural factors like the effectiveness of law enforcement in combating copper theft also impacts substantially on theft levels," he said.
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