A group of military officers say they have seized control of Guinea-Bissau amid reports that the president, Umaro Sissoco Embaló, has been arrested.
Shortly after gunshots were heard in capital city Bissau, government sources told the BBC that Embaló had been detained.
The reports come three days after a presidential election in which the main opposition candidate was disqualified.
The results were expected on Thursday - both Embaló and his closest rival Fernando Dias have claimed victory.
Witnesses in Bissau heard gunfire at around 13:00 GMT on Wednesday but it was not immediately clear who was involved in the shooting or if there were any casualties.
