(CNN)Security forces raided a hotel under siege in Burkina Faso and freed 63 hostages early Saturday — hours after their nightmare began.

Of those freed, 33 have been hospitalized, Burkinabe Foreign Minister Alpha Barry told CNN affiliate BFMTV. He said preliminary reports indicate that 20 people were killed.

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Burkinabe forces scoured the rooms at the Splendid Hotel, looking for terrorists and any remaining hostages, state broadcaster RTB reported. Those rescued included a government minister.

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Al Qaeda in the Islamic Maghreb claimed responsibility for the Friday night attack in the capital of Ouagadougou.

Burkinabe forces, with logistical support from American and French troops, circled the hotel for several hours before they rescued hostages.

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Shortly after they stormed the hotel, gunshots that had raged for most of the day died down.