SAO PAULO (AP) -- Workers building a World Cup stadium in northeastern Brazil have gone on strike to demand payment of delayed salaries.
The union representing the workers said about 500 men stopped working in the host city of Fortaleza on Monday.
The consortium of construction companies building the stadium told local media they are already negotiating with the workers to try to end the strike.
Four other host cities have been affected by workers' strikes in the past, including Rio de Janeiro, home of the competition's final at Maracana.
Unions have said recently they are trying to centralize efforts and have threatened a work stoppage in all 12 host cities to demand unified salaries and benefits.