SAO PAULO (AP) — Local organizers have dismissed the possibility of design problems with the new roofs at two World Cup stadiums after it emerged Thursday that the same contractor also designed the roof that led to the closure of the Olympic athletics venue in Rio de Janeiro. Projeto Alpha, headed by engineer Flavio D'Alambert, was responsible for the roof at Rio's Joao Havelange Stadium, which was temporarily closed on Tuesday following reports of structural problems. D'Alambert maintains the stadium remains safe, despite the city's decision to close it. Meanwhile, local World Cup organizers said the roofs of the Arena Pantanal in Cuiaba and the Arena Castelao in Fortaleza have both been tested and will not pose any safety risks. Cuiaba organizers said "there is no reason" for concern despite what happened in Rio.Read more on NewsOK.com