The claims by AAP MLAs that they have been approached by the BJP and offered up to Rs 20 crore to switch sides is a matter of forensic investigation and they should undergo a lie detector test, the BJP said on Wednesday.

Addressing a joint press conference, BJP MPs Manoj Tiwari, Ramesh Bidhuri, Hans Raj Hans and Parvesh Verma alleged that the Aam Aadmi Party (AAP) is doing a "drama" of being an "anti-corruption" party and the investigation will "expose" them.