Rio Tinto under fire as Mongolia presses for mine deal changes

ULAANBAATAR/LONDON (Reuters) - Mongolia will vote in August to rip up parts of an investment agreement with Rio Tinto for the Oyu Tolgoi copper mine, which may force the miner to make concessions in a project beset by delays and political squabbles.

FILE PHOTO: Mining trucks are seen at the Oyu Tolgoi mine in Mongolia's South Gobi region June 23, 2012. REUTERS/David Stanway/File Photo

The country owns 34% of the mine, Mongolia's biggest foreign investment project, but lawmakers claim delays and cost overruns have meant it has run up more debt from the project than income thus far.