Security guards working the World Cup matches in Cape Town and Durban, South Africa, have gone on strike.
World Cup committee chief executive Danny Jordaan said the problem was an "employer-employee wage dispute."
On June 13, police broke up a protest by about 500 guards at the Moses Mabhida stadium in Durban. Workers said their basic daily pay had been slashed by about one-third without notice.
On June 14, guards at the Green Point stadium in Cape Town also walked off the job.
Police have taken over security duties at both stadiums.
The staff walked out after wage talks with the organizing committee and Stallion Security Consortium failed to reach a resolution.
The private firm also handles security at other World Cup venues but so far those stadiums have not been affected, said officials.
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