Police are currently at the scene determining the circumstances of the incident. None of the injuries is believed to be life-threatening.
There is no information yet about the identity of the shooter or his or her possible motivation for the attack. Similarly the names of the victims have not been released and they are receiving hospital treatment.
Police spokesman Rimants Kārkliņš told LTV investigations were continuing but no-one had yet been arrested in connection with the incident. He appealed to the public for information that might help with the police enquiry, which is starting on the assumption that the act was a murder attempt.
According to information obtained by LETA, the incident happened at the Vitality Academy clinic, a private health facility specializing in weight loss.