BANGKOK, March 29 (Reuters) - Thailand's government is considering drafting a casino bill and if passed by parliament, it would be able to invest in a mega entertainment project, Prime Minister Srettha Thavisin said on social media on Friday.

Casinos are illegal in Thailand and the only gambling allowed is on state-controlled horse races and the lottery, though illicit gambling is rife. (Reporting by Chayut Setboonsarng; Editing by Martin Petty)