Latehar, June 28 (ANI): Acting with brazen impunity, the Maoists opened fire on a bus in Latehar district of Jharkhand, injuring three passengers critically. One of the injured passengers who have been rushed to the hospital said that the Maoists torched their bus, before they could flee from the site. Also known as Naxals, the rebels have fought for decades in a wide swathe of central and eastern India, including many resource rich regions, where tensions run high between poor farmers and industrial developers. The government calls them Indias main internal security threat and an obstacle to higher growth and more jobs in the country. Hundreds die annually in the conflict, although levels of violence have fallen in recent years.