Indian companies on Tuesday reduced natural gas supplies to industries in anticipation of tighter supply from the Middle East after top producer Qatar halted production, four industry sources with knowledge of the matter said. Qatar halted its liquefied natural gas production on Monday, as Iran continued to strike Gulf countries in retaliation for Israeli and US strikes against it. The attacks have also halted oil and gas shipments through the Strait of Hormuz, driving up global energy prices and shipping costs. Top LNG importer Petronet LNG Ltd has informed GAIL, the top gas marketing company, and other companies about lower supplies, two of the sources said. GAIL and Indian Oil Corp informed customers of the gas supply cut late on Monday, one of the sources said.