"There was a delay of the payment and there was a strike," he said.
The deadline for Curitiba's stadium has already been pushed back to mid-February because of construction delays that officials said resulted from belated financing. The stadium belongs to Brazilian first division club Atletico Paranaense and is undergoing extensive renovation to host matches in next year's World Cup.
Mauro Holzmann, the club's marketing and communications chief, downplayed the labor unrest.
He claimed that only 150 workers were involved and they only downed tools for two hours on Friday. He also said their pay was just one day late and that the labor contractor has since been paid. He didn't know, however, if the contractor had relayed the payment to the workers.
"It won't happen again. It was just a little misunderstanding," Holzmann said.
A group of workers taking a break in the stadium said they were owed one month's pay. They said they would down tools again next week if the money promised to them doesn't arrive.
The Arena da Baixada will host four World Cup matches, including Australia vs. Spain on June 23.
The Curitiba stadium is expected to hold its first test game in February, two months after the original deadline established by FIFA for stadium delivery.
Officials said it took longer than expected to put together the stadium's complex financing.
"It was just red tape, Brazilian bureaucracy," Holzmann said. "A state development bank loan originally expected in June 2012 was seven months late."
Atletico Paranaense, which finished third in this year's Brazilian league, is funding one third of the renovation costs, with the rest coming from state and city governments. The renovation was expected to cost approximately $80 million but is now budgeted at almost $115 million.
The playing field has not been laid or even flattened, with mounds of earth and gravel still in place.
Most of the seats haven't been installed, the roof isn't finished and VIP boxes have no glass or fittings.
Organizers recently gave up on installing a retractable roof that was in the original design. FIFA made the request to remove the roof from the World Cup project because it would not be finished in time and would delay the overall construction.
In early October, a Brazilian labor judge halted work at the Arena da Baixada for nearly a week due to safety concerns.
Maryland to battle Notre Dame in NCAA final
O Sasho Cirovski and Bobby Clark have developed a strong bond that has spread across four decades and two continents, with both men growing into two of the most respected college soccer coaches in America. On Sunday, they will collide in the NCAA men's soccer championship in Chester, Pa., with Cirovski's Maryland team taking on Clark's Notre Dame squad. Maryland (17-3-5), seeded fifth, beat Virginia 2-1, and third-seeded Notre Dame (16-1-6) shut out New Mexico 2-0 in the semifinals Friday to set up the all-ACC College Cup final. > Sunday, 1 p.m., ESPNU