Masked men forced their way into a family home in West Dunbartonshire during an armed raid.
The trio threatened a man and woman within the house, with one of the perpetrators having what appeared to be a gun.
Children were also within the house in Montrose Street, Clydebank, as the robbery was carried out at 5pm on Wednesday.
The men made off with a three figure sum of cash, as well as other items of value from the property.
Detective sergeant David Lavery said: “The men threatened the couple with violence but thankfully no-one was injured as a result of this incident. There were children also within the home.
“From our enquiries so far we understand that the threat was directed at the couple with no wider risk to the public.
“We are looking to trace the three men involved who were wearing surgical face coverings at the time.
“Officers are reviewing CCTV opportunities and carrying out house to house enquiries.
“There were a number of people and vehicles in the street near to this address when this incident took place and we would like to hear from anyone who has any information or knows who is responsible for this crime to come forward.”
If you have any information contact police on 101.