Multiple gunshots have been fired into the air by a man in the middle of the capital Bangkok, police said Friday.
No one has been reported hurt, according the the city's Erawan Medical Center, which coordinates emergency response services.
The man suspected of firing some 20-40 shots was refusing to surrender more than six hours later.
Police have cleared the area around the building where the man is, and Thai TV Channel 3 said a family member was brought in to try to convince him to surrender.
The shooting was reported to have started at about 4 a.m. Friday in a residential neighborhood with small shops, many selling sporting goods, next to Chulalongkorn University.
The incident comes less than a week after a shooting rampage in northeastern Thailand by a soldier who killed 29 people.