Thiruvananthapuram | A day after senior Congress leader D K Shivakumar questioned the contribution made by Rajeev Chandrasekhar to the development of Kerala, the BJP leader on Wednesday hit back by saying he does not need the certificate of a "corrupt" politician who is out on bail.

Chandrasekhar, who is facing off against Congress' Shashi Tharoor in the Thiruvananthapuram Lok Sabha constituency, said ever since he began his poll campaign, he has stated what he will do if he wins and will follow through on that.

He further said in the next couple of days he would be releasing a vision document on bringing development and investment to the southern state.

"Once I become an MP and a minister from here, for the next five years I will work to implement that vision document," Chandrasekhar, also the Union Minister of State for Information Technology and Electronics, told a TV channel.

Regarding comments by Karnataka Deputy Chief Minister Shivakumar against him, Chandrasekhar said everyone knows the Congress leader was "an out on bail and a corrupt politician".

"I do not require his certificate. Shashi Tharoor can have his certificate. Everyone knows what kind of person Shivakumar is, his politics and his background. So I have nothing to say to him," the BJP leader said.

Shivakumar, also the Karnataka Congress chief, was in Kerala on Tuesday and at a press conference had questioned what contribution Chandrasekhar had made to Kerala's development.

He had also said Chandrasekhar was morally obligated to resign as a minister before contesting the elections.

Shivakumar had also claimed there was no BJP or Modi wave in the country and asserted that the INDIA bloc will form the government at the Centre.

The Karnataka Congress chief had taken part in the roadshows of Tharoor and KPCC chief K Sudhakaran in Thiruvananthapuram and Kannur, respectively.

The Lok Sabha elections will be held in Kerala on April 26 and the results will be declared on June 4.