Sorry to hear the bad news.
Is your property in the Campo?
Unusual after you had security system there,
Have you had work done there recently?
We know people who had work done, then about a year later they returned to the property to find the builder and another guy running away from there.
They had broken in, even with owners dogs there, and had taken jewellery and many small valuable items.
Hope the police catch the culprits, for you.