"Thirteen accused in the May 17 attack in which 33 people, including police personnel, lost their lives, were acquitted by the court of Additional Sessions Judge Anita Dahariya at Dantewada," defence lawyer Bichen Pondi told PTI.
"The prosecution failed to provide substantial evidence that could have led to their conviction," he said.
On May 17, 2010, Maoists allegedly blew up a bus heading towards Sukma from Dantewada near Chingawaram rivulet, triggering a landmine blast, in which 33 people, including police personnel were killed, while 20 others were injured.
Three months ago, the Dantewada district court had acquitted all ten arrested, due to lack of evidence, in connection with the 2010 Tadmetla attack case, in which 76 security personnel were killed in Dantewada district.