Aluminum Corp of China (Chalco) <2600.HK> has ended an agreement to buy a 29.9 percent stake in Winsway Coking Coal <1733.HK> as it would not be able to win approvals from Chinese and overseas authorities by the September 30 deadline, it said in a stock exchange filing late on Friday.

The move comes weeks after Chalco abandoned plans to buy a majority stake in Canada's Mongolia-focused coal miner South Gobi Resources due to political hurdles.

Chalco had said in April that it would buy a stake in Winsway, which supplies Mongolian coking coal imported into China, for $308 million.

(Reporting by Vikram Subhedar; Editing by Daniel Magnowski)