Now, they are saying that an investigation is ongoing regarding the air ambulance flight. The air ambulance left the country for Bangkok in the morning on May 25. Sources said the medical emergency certificate which they used for the procedure was issued by Zainul Haque Sikder Women's Medical College, a sister concern of Sikder Group. According to sources, the brothers took a private air ambulance of R&R Aviation, another concern of Sikder Group. No officials of Sikder Group were available for confirmation and comments.

Source: Dhaka Tribune May 29, 2020 15:45 UTC