Nov 15 (Reuters) - Amplify Energy Corp said on Monday it was withdrawing its full-year forecast as it suspended its Beta Field operations after an oil spill in southern California.

The 3,000-barrel spill (126,000 gallons), which happened in October, may have happened after a ship anchor struck a pipeline connected to an offshore oil rig owned and operated by Beta Offshore, Amplify's California unit. (Reporting by Ruhi Soni in Bengaluru; Editing by Ramakrishnan M.)