World football's governing body last month introduced the new ruling banning matches at more than 2,500m above sea level, citing its wish to better protect players' health.

The ruling has however stirred up a storm in Latin America.

"We will be asking FIFA to provisionally suspend the application of this measure until studies on the medical effects (of altitude) are concluded," Conmebol secretary general Eduardo Deluca said.

"Because up until two weeks ago we could not exceed 2,500 metres while now it's 2,800m, with the possibility to go until 3,000m which can modify all the data," added Deluca.

On Friday morning a member of the Conmebol's medical commission claimed that FIFA were ready to authorise international matches to be played at a maximum of 3,000m and not 2,500m as they originally ruled.

This would allow Bogota (2,640m) and Quito (2,800) to host qualifying matches for the 2010 World Cup, but not Bolivia capital La Paz (3,577m) and Cuzco (3,300).

According to Conmebol, FIFA's executive committee are due to meet again in Zurich on June 27 to discuss the affair.