No players or officials were hurt in the incident.

It was believed to be a small rock or stone thrown by a child.

Australia cancelled a tour to Bangladesh in 2015 because of security concerns.

CA's head of security Sean Carroll explained what happened.

"En route back to the hotel last night a window on the Australian team bus was broken. No one was injured in the incident," Carroll said on Tuesday.

"Team security personnel are currently in discussion with local authorities while they investigate the cause, which is believed to have come from a small rock or stone.

"Bangladesh authorities are taking the incident seriously and security has been increased on the route.

"To date we have been happy with security measures that have been in place and we are comfortable with the response from the Bangladesh authorities and the increased security presence we have been provided in light of the incident."