In the second brazen attack in as many days, Naxals on Friday blew up an anti-landmine vehicle, killing 10 security personnel in Chhattisgarh's Dantewada district. The anti-landmine vehicle of the security force was approaching a bridge near Gatan village when the Naxals triggered a powerful blast and opened indiscriminate fire on them, said the police.Seven Special Police Officers and three police jawans were killed when their vehicle was tossed in the air by the blast.