Police said they were confident that they would be able to find the people who fired shots into the sky during New Year celebrations and injured people with stray bullets.
Royal Thai Police spokesman Pol Lt-General Prawut Thawornsiri said investigators were studying the trajectory of the stray bullets in order to determine the possible location from where the guns were fired.
Police will also look for witnesses before questioning suspects, Prawut said. "I believe the culprits will be found."
At least three people were injured in separate incidents involving stray bullets believed to have been fired during New Year celebrations.