International sports federations expressed concern on Tuesday over problems with venues for the Olympic Games in Rio de Janeiro, including power failures this week at the gymnastics arena.
Members of the Association of Olympic International Sports Federations (ASOIF) reviewed preparations for the Rio Games, which open in less than four months on August 5.
"They miss some very important details in each field of play," ASOIF president Francesco Ricci Bitti said at the group's annual meeting.
Ricci Bitti told delegates that IOC President Thomas Bach "is worried like you, like me" about details for Rio.
Rio's sports director acknowledged to the 28 Olympic sports that the city's seven-year preparations "were not perfect or up to your expectations" but said the games would be a success.
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"I can assure you that the athletes will not have any problems in Games time, nor any of you in your events," Agberto Guimaraes said.
The comments followed complaints raised by the gymnastics federation, known as FIG, which is holding its artistic gymnastics test event this week at the Rio Olympic arena.
FIG official Ron Froehlich cited power outages, putting at risk athletes' safety and the scoring system, plus missing equipment at an underfunded temporary training venue.
"Most important, they have problems with regard to the Omega (scoring) system," Froehlich said. "Furthermore, power outages while the athletes were performing, which is a very serious issue."
The absence of flooring at a temporary training centre was "due to lack of funding", he said.
Earlier, ASOIF director general Andrew Ryan disclosed that two top IOC officials would travel to Rio soon to work more closely on preparations.
Christophe Dubi, the Olympic Games executive director, and sports director Kit McConnell are "moving permanently" to the host city, Ryan said.
Dubi's predecessor Gilbert Felli was assigned to work with local organisers two years ago amid growing concerns about Rio's readiness.
Guimaraes also addressed longstanding problems of water pollution and "floating garbage" in Rio, and the possibility of officials' accommodation - including a Trump hotel - not being ready, before giving further assurances.
"The athletes will be happy with the results that we have achieved," he said. "You and your federations will be happy with the level of service that we will provide to you."
Rio organising committee head Carlos Nuzman said the impeachment process against Brazilian President Dilma Rousseff would not affect the final preparations.
"Until today, we have no involvement, no problems with any political or economic situation in the country," Nuzman said.
