It's related to the coup attempt, a Burkinabe security source told Reuters.

Both men are currently in the Burkinabe capital Ouagadougou awaiting new mediation efforts.

Several other Burkinabe radio stations also appeared to have stopped transmitting.

Inside, Burkinabe and French security officials were conducting an investigation.

Burkinabe President Blaise Compaore has led recent mediation efforts between the junta and the opposition.

There was no official comment from the Burkinabe government.

Separately, a police source in Conakry said a Burkinabe plane had taken off from the airport.

It does not take into account the interests of the Burkinabe people, he told French RFI radio.

In 2003, Burkinabe researchers began testing Bollgard II cotton that was being grown in the United States.

Burkinabe officials have described him as "lucid", but statements about his condition have been misleading.

The Burkinabe share top place in Group D with Uganda but have the advantage in the head-to-head stakes.

However, there were immediate indications that the ECOWAS proposal might struggle to gain support among the rival Burkinabe groups.

The Burkinabe official said Camara still wanted to return to Guinea but played down prospects of an imminent homecoming.

Burkinabe mediators refused the request.

In the past, Gbagbo has not shied away from insinuating that Ouattara is Burkinabe and has no right to run.

A military base in the same region was attacked by militants in August last year, with one Burkinabe policeman killed.