Police are currently attending at a property in Bonhill as part of an "ongoing investigation".
It is understood officers arrived at Ladyton this morning (April 3) and entered a property in the estate where they are currently carrying out a search.
A number of police vans and forensic teams remain at the scene while a search is carried out.
A Police Scotland spokeswoman confirmed it was part of an ongoing investigation.
One neighbour, who lives near the property, said: "I looked out and saw the police van this morning and more and more police have arrived and they are currently going into the house with their white forensic suits on.
"They are all out in the streets and going in and out of the house with cameras.
"I noticed a few plain clothes officers too so it looks like there is something serious going on."
A Police Scotland spokeswoman said: "Police are currently searching an address in Ladyton, Alexandria, as part of an ongoing investigation."
Updates to follow.
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