The police raided KT’s offices in Seoul and Gyeonggi Province as part of an investigation into a recent data breach at the mobile carrier.

The anti-corruption and economic crime investigation team at the Gyeonggi Nambu Provincial Police said on Wednesday that the raids were underway at three locations, including KT’s offices in Pangyo, Gyeonggi Province and Bangbae-dong, Seocho District, Seoul.

In August, the U.S.-based cybersecurity outlet Phrack reported that KT's servers had been breached, and lawmakers later raised suspicions that KT had disposed of the affected servers.

In response, the Ministry of Science and ICT asked the police to investigate whether KT had submitted false documents and concealed evidence.

The police plan to analyze the seized materials to determine whether KT deliberately destroyed servers following the data breach.