Net income in the three months to March 31 was AED27.6m (US$7.52m), compared with AED35.9m in the year-earlier period.
"Restrictions on the natural gas supply resulted in consumption of more expensive liquid fuels," the company said in a statement on the Abu Dhabi bourse Web site, without giving further details.
Sales revenue climbed 12.5 per cent to AED90.2m. Earnings per share fell to 57 fils.