"If in the days to come the electoral commission does not correct this dysfunction, the opposition will not be able to accept the results and will decide on future actions," he said.
Earlier in the day, the European Union observer mission issued a preliminary declaration saying there had been significant organizational problems but that voters had been able to freely express their will.
The electoral commission had been expected to release partial results Monday night, but an official who insisted on anonymity because he was not authorized to speak to the press said a spokesman had fallen ill, delaying the announcement. Provisional results are expected to be announced Tuesday.
Authorities have warned against the dissemination of unofficial results. Supporters of both the opposition and ruling parties took to the streets of Conakry Sunday night celebrating victory, and mass text messages were also distributed declaring winners for individual races.
Alassane Conde, minister for territorial administration, warned in a statement late Sunday that anyone "sowing confusion" by broadcasting fake results would "face the rigor of the law."