Hours after the Bharatiya Janata Party announced that Union Minister Ravi Shankar Prasad will contest from Bihar's Patna Sahib in national elections instead of the sitting lawmaker, Shatrughan Sinha, he warned the party on Saturday and said he can "answer back in the same coin". In a series of tweets, the actor-turned-politician slammed the BJP and quoted Newton's third law: "Remember Newton's third law...every action has an equal and opposite reaction." "What you & your people have done with me, is still tolerable. I'm able & capable of answering your people back in the same coin (sic)," the party's in-house critic tweeted. He also accused the party of "orchestrating the departure of a most respected friend, philosopher, guide, father figure & ultimate leader of the party Shri. L.K.Advani, from the political arena". BJP National President Amit Shah will contest from Gujarat's Gandhinagar this time in place of veteran party leader Mr Advani, the BJP said on Thursday as it announced its first list for national elections. Stepping up the attack against the ruling party, he said that Mr Advani's replacement by the party president "whose image or personality is no match nor a patch on him" has not "gone down well with the people of the country". That too through the replacement of Mr. Advani by none other than the man who is also the President of the party but whose image or personality is no match nor a patch on him. This has been done deliberately & intentionally & hasn't gone down well with the people of the country. - Shatrughan Sinha (@ShatruganSinha) March 23, 2019 He is a father figure & no one can approve of such a treatment to a father figure. What you & your people have done with me, is still tolerable. I'm able & capable of answering your people back in the same coin. Remember Newton's third law...every action has an equal and - Shatrughan Sinha (@ShatruganSinha) March 23, 2019 opposite reaction. And I am capable of paying back... But having done the same to stalwarts like - to begin with respected, Shri Yashwant Sinha ji, followed by most learned Arun Shourie - Shatrughan Sinha (@ShatruganSinha) March 23, 2019 While Mr Sinha has called the move to replace Mr Advani "intentional", Shiv Sena, in its mouthpiece, "Saamna", also criticised its ally's decision and said that Mr Advani "would remain the tallest leader of the BJP".