(Reuters) - Sinopec Shanghai Petrochemical Co has shut its crude oil refining and ethylene units to evaluate hidden safety risks after a fire on Saturday that hit a chemical facility, a company spokesperson said on Monday.

The spokesperson did not specify the duration of the shutdown but said the firm will ensure stable domestic fuel supplies.

The Shanghai-based plant, controlled by state refiner Sinopec Corp, operates 16 MMtpy (320,000 bpd) crude oil refining capacity and 700,000 tons of ethylene capacity annually.

Head of China Petrochemical Corporation (Sinopec Group), the parent firm for Sinopec Shanghai and Sinopec Corp, was summoned by China's ministry of emergency management on Monday after recent safety incidents, the ministry said in a statement.

Sinopec Group is asked to improve areas such as aging facilities and inadequate on-site management, the statement added.