Siliguri/ Kolkata, April 20 -- An election official went missing and a Class 7 student suffered a bullet injury on his left ankle in a suspected political clash on Friday, a day after the second phase of voting in the eastern state where the Centre has sent an additional 50 companies of paramilitary forces over concerns of poll-related violence. In Darjeeling Lok Sabha constituency, which voted on Thursday, a bullet grazed Mohammed Abdul in a village in Chopra block, triggering a blame game between the ruling Trinamool Congress and the Bharatiya Janata Party (BJP)....