Super helpful member
The Spanish government are currently announcing that the lockdown is extended to April 26th.
This will increase pressure on those who have second homes to retreat to them. They could be bringing something with them that can kill you, completely illegally.
If you see anyone arrive in your area you MUST ring 062 and report them. If they came waving guns or knives around you would immediately ring the police, and the danger they present is no different.
Forget any stupid concepts about not "snitching", being a "grass" or whatever, or thinking that it is not your business. It is everyone's business to save lives.