Below is an article in The Leader newspaper. I thought it may help people and warn people again as I know this subject has been on here before.
The British Consulate in Alicante has requested that its nationals be on alert when they arrive in either El Altet airport outside Alicante. San Javier Airport in Murcia or Manises airport outside Valencia due to the considerable increase in luggage theft.
The problem has apparently grown to such an importance that it now features on a travel advisory issued by the Foreign Office. The Consulate revealed that people should be careful when going to pick up their rented car at any of these airports, as they may be followed. When the recent arrivals get to the car, they discover that one or more tires are flat, and in the confusion of being offered help their luggage disappears. The Consulate also advises that on the E15, A7, A70 and N332 main roads many people have fallen victim to people passing themselves off as plain-clothes policemen, and had valuable stolen as a result.
The Consulate makes it plain that in all cases concerning traffic incidents or inspections, these are only carried out by uniformed members of the police force - be they the National Police, or more typically, the Guardia Civil