LONDON (Reuters) - Mobile group Vodafone and Romania-based operator Digi said on Thursday they had signed a memorandum of understanding with Hellenic Telecommunications Organization to buy its subsidiary Telekom Romania Mobile (TKRM).

Vodafone said under the terms of the agreement it would buy TKRM and a significant proportion of its assets and Digi would also buy some assets.

The British company said talks remained at an early stage and there was no certainty that a deal would be agreed.

(Reporting by Paul Sandle; editing by James Davey)