Spain has become the latest country to launch an investigation into the collection of sensitive wi-fi data by Google.

Google has admitted that its Street View cars had "accidentally" collected data from unsecured wi-fi networks in more than 30 countries.

It is in response to a complaint by a privacy watchdog called Apedanica.

The Google representative has been summoned to explain what data was collected, how it was obtained and the number of people affected.

"We are working with the authorities in Spain to answer any questions they have," said a spokesperson for Google.

"Our ultimate objective is to delete the data consistent with our legal obligations and in consultation with the appropriate authorities."

Investigations are ongoing in France, Germany and Australia.

BDST: 1615 HRS, 18 August 2010