The Congress on Wednesday accused the BJP and the Maoists of being hand in glove in Chhattisgarh and asked Chief Minister Raman Singh to resign in the wake of the attack on a Congress convoy in the state which left 28 people dead.

"The BJP and the Maoists are working together to serve each others' purpose. The BJP has not responded to questions raised by us. They are silent because they have a vested interest," Congress spokesperson Bhakta Charan Das told reporters.

"The chief minister should own responsibility for the incident and resign."

He said that the state government would benefit from the attack in Sukma district May 25 as Congress workers will find it difficult to mingle with people and voters would be intimidated to come out.

"Due to mass mobilisation, people had started coming to our rallies in the past one year. The Maoists did not like this," Das said.

He ruled out invoking president's rule in the state, saying the party would like to explore democratic institutions.

"Elections will happen in the state. People will see through the BJP. Our political activity will continue," he said.