South Korean police have raided Google's office in Seoul as part of an investigation into the company's collection of private Wi-Fi data.
Members of the Cyber Terror Center of the Korean National Police Agency seized computer hard drives and papers, according to the Korea Herald.
Google said in a statement that it would co-operate with the investigation into data collected by the firm's vehicles as they recorded images for its Street View service.
The revelation that Google was collecting Wi-Fi data alongside images for its Street View service has sparked several investigations around the world into the matter.
After the practice was uncovered by German authorities in May, Google withdrew its Street View vehicles to remove the Wi-Fi monitoring capability.
The company claims code for Wi-Fi data collection was included in software for the Street View cars by mistake.
Google's fleet of Street View cars have since been redeployed in the UK and elsewhere after consultation with local authorities.
Despite Google's admission that it made a mistake, investigations into the matter are still underway in the US, Canada, France, Germany, Spain, Australia and New Zealand.