LONDON, July 20 (Reuters) - A Moroccan court has granted an extra three months for the liquidation process for Samir, the country's only oil refinery, a court-appointed trustee told Reuters.

"The deadline has been extended to October 21," Mohammed El-Krimi said.

The 200,000-barrel-a-day refinery was shut in August due to financial difficulties. It was placed in liquidation and an independent trustee was appointed to run it.

Two sources close to the matter previously confirmed to Reuters that at least two offers were submitted for Samir, but neither was a firm offer, prompting a court extension for the deadline.

A Moroccan court ruled last year that Samir should be liquidated despite attempts to restart production by the company, which was controlled by the Corral Petroleum Holdings group of Saudi billionaire Mohammed al-Amoudi.

Samir became the biggest casualty of the 2014-2015 oil price crash in the Mediterranean region, unable to repay debt from the sale of petroleum products.

Court-appointed experts value the company at 21.6 billion dirhams ($2.1 billion).

(Reporting by Samir Errazzouki; editing by Patrick Markey and Jason Neely) ((pat.markey@thomsonreuters.com; +213-661-692993; Reuters Messaging: pat.markey.thomsonreuters.com@reuters.net))