Bangladesh Army has termed Tuesday night's incident involving members of the army and police in Jurachhari upazila of Rangamati as unfortunate.
A press release was issued from the Inter-Services Public Relations (ISPR) on Wednesday.
A joint investigation by the Bangladesh Army and police is underway to determine the root cause of the incident, said the release signed by ISPR Director Lt Col Sami Ud Dowla Chowdhury.
The investigation will identify those responsible for the incident.
Appropriate legal actions will be taken against the responsible individuals once the investigation is completed, it said.
It also requested everyone not to be misled by provocative statements and rumours as the incident is under investigation.