The bypoll was necessitated due to the death of Congress MP H Vasantha Kumar in August last year due to COVID-19.

The BJP's Central Election Committee (CEC), which met earlier under its National President JP Nadda and attended by Prime Minister Narendra Modi, Defence Minister Rajnath Singh and Home Minister Amit Shah, approved the candidature of Radhakrishnan, the party announced in a statement in Delhi.

The BJP had on late Friday night, clinched its seat- sharing deal with its southern ally AIADMK for the April 6 Assembly polls in the state where the latter, the lead partner, allocated 20 seats to the saffron party, besides the Kanyakumari parliamentary segment, besides extending its full support to the candidate.

Radhakrishnan had won from Kanyakumari in the 2014 parliamentary polls to be inducted in then Modi-led NDA dispensation as Minister of State, but lost the subsequent 2019 Lok Sabha elections to Kumar from the same constituency.

He was then MoS Finance and Shipping.

Radhakrishnan is also a former state BJP president.