The attack came as mediators led by Senegalese President Macky Sall -- who also chairs the Economic Community of West African States (ECOWAS) -- were due to announce an exit plan today morning for the landlocked west African country from the crisis triggered by Thursday's military coup.
An AFP journalist at the scene said the supporters of General Gilbert Diendere were clearly aiming to pressure the mediators, who also include the UN representative in Africa Mohamed Ibn Chambas.
Though he did not specify exactly what the announcement would be, he did hint at a return to power of Burkina's interim government.
Arriving before any announcement could be made, Diendere's supporters forced their way into the hotel, caused mayhem in the lobby and took off again.
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"What we want is for Diendere to stay and organise elections quickly like he promised. We are killing each other in the neighbourhood and the country because of exclusion, we need inclusive elections," a Diendere supporter said on condition of anonymity.
Just before Diendere's supporters arrived, protesters from the "Balai citoyen" (Civic Broom) movement that led an uprising which deposed Compaore last October, also gathered outside the hotel, seeking to "maintain pressure" on the talks until an announcement was made.
At least 10 people have been killed and 113 wounded in clashes sparked by Wednesday's detention of the interim president and prime minister a by presidential guard officers, a source at Ouagadougou's main hospital said.