"This is an act of cowardice and attack on democratic values," Gehlot said in a statement.
"Violence and terrorism have no place in democracy. The attack is also a big failure of BJP government of Chhattisgarh which failed to protect the Yatra," Chandrabhan said.
They also expressed grief over the death of senior party leader Mahendra Karma and other Congress workers while wishing speedy recovery to those who were injured.