GUWAHATI, India: An official says police and army soldiers have launched a manhunt in India's restive northeast a day after suspected insurgents ambushed a lawmaker's convoy killing six police and a civilian driver in a hail of bullets. W. Keishing, an independent lawmaker from Manipur state, escaped unhurt from Friday's roadside attack on the outskirts of Imphal, the capital of Manipur state. A police official in Imphal said Saturday that no one had claimed responsibility for the attack but troops were scouring the area. He could not be named because he wasn't authorized to speak to the media.