Germany's federal cartel office Bundeskartellamt wants to probe the planned take-over of the country's third-largest cable operator Kabel BW by US media company Liberty Global.

An application was submitted at the EU Commission to transfer the proceedings to Germany, cartel office spokesman Kay Weidner told Rapid TV News.

The acquisition was registered at the EU Commission because of its turnover volume for formal reasons, independent of its actual impact on competition, explained Weidner. As the deal would mainly or completely affect competition in Germany in the cartel office's view, the application was made to move the probe to the domestic anti-trust authority, Weidner said.

The EU Commission now has to decide whether to agree to the shift or not - if not, the case will remain in Brussels.

Liberty Global announced in March 2011 to purchase Kabel BW from Swedish financial investor EQT for €3.16 billion . In conjunction with Unitymedia, which it acquired in November 2009, the US company wants to create a strong counterweight to market leader Kabel Deutschland.

Kabel BW serves around 2.4 million households in south-western federal state Baden-Württemberg with TV, internet and telephony