Ukrainean supporters of Viktor Yushchenko in the country's disputed presidential election say they have an audio tape that proves vote fraud occurred in the election.

Friday, officials from Yushchenko's campaign released audiotapes to reporters that they claimed proved the election was rigged.

The officials said the tapes came from law enforcement officials, and say that an official with Yushchenko rival Viktor Yanukovych's party can be heard saying that they need to get into the computers because the vote counts are down and they have to increase them.

The authenticity of the tape has not yet been independently confirmed, CNN reports.

Meanwhile, Ukraine's parliament has decided to hold an emergency debate on the crisis on Saturday, Reuters news agency quoted a spokesman for the chamber's speaker was as saying. All the chamber's factions supported the plan except Yanukovych's Party of the Regions.

The two candidates in Ukraine's disputed presidential election and mediators have also announced a working group for further talks, but reached no other agreement on resolving the crisis gripping the country.