3 Min Read (Reuters) - India’s Home Minister Amit Shah cut short an election rally in the east on Monday to head to the mineral-rich central state of Chhattisgarh, where Maoist guerillas at the weekend killed 22 security force members, officials said. Slideshow ( 3 images ) In addition to the fatalities, 30 other members of the Indian police and paramilitary forces were wounded in a four-hour gun battle with Maoist rebels on Saturday, the deadliest ambush of its kind in four years. On Monday, Shah travelled to Chhattisgarh to meet the injured pay tribute to those killed. Also known as Naxals, the Maoists have waged an armed insurgency against the government for decades. Their leaders say they are fighting on behalf of the poorest, who have not benefited from the economic boom in Asia’s third-largest economy.