Members of the public are told to expect an increased presence of emergency services and military vehicles in Edinburgh this week as major incident training is carried out.
Pre-planned drills involving agencies such as Police Scotland and the Scottish Fire and Rescue Service will take place between Monday October 17 and Thursday October 20.
This will help test their response to a series of major incidents, including a scenario featuring hazardous materials.
The last time an exercise of this magnitude took place was in October 2017.
There has been no such exercise since then due to the impact of the Covid pandemic.
Deputy Chief Constable Mark Williams, chief of operational support, said it was important the drills were “as realistic as possible”.
However, he said they will be planned “proportionately” in controlled environments, with limited disruption to people living nearby.
“This is one of many pre-planned exercises and not in response to any specific threat,” he explained.
“The public should rightly expect Police Scotland to practice and strengthen our response to a major incident alongside other organisations.
“We are part of a well-established multi-agency training program that provides valuable training and learning.
“It is important that exercises are as realistic as possible, but they are always proportionately planned in controlled environments and there will be little disruption to people living nearby.”