IOC members grilled the head of the 2016 Rio de Janeiro Olympics on Sunday about delayed preparations for South America's first Games.

Carlos Nuzman, head of the Brazilian Olympic Committee and the Rio Games, offered few concrete responses to blunt questions on Sunday as he sat in front of about 100 IOC members during their general assembly in Buenos Aires

A team of IOC inspectors, headed by Morrocan Nawal El Moutawakel, visited Rio a week ago and warned that work must be sped up. El Moutawakel sat near Nuzman and repeated the need for transparency in preparations and better cooperation between various levels of government.