A fire started at a bar in Bangkok called Rong Beer Na Lat Phrao. It is in the Chatuchak area. It is also a place where people eat and have fun.
Thai officials say at least 27 people died. The prime minister said a musician was there when the fire began. Many people tried to escape from the smoke and flames.
Officials said the fire may have spread fast because of things inside the building. They also said some exits may have been blocked. Police and other officers are checking what happened.