AIADMK (Amma) leader T T V Dinakaran was arrested on Tuesday night after four days of questioning by Delhi Police. He was booked following the arrest of Sukesh Chandrasekhar, a middleman, from a five-star hotel in Delhi. 

He is accused of attempting to bribe an Election Commission official for retaining the party symbol's poll symbol of "two leaves" for his faction.

Dinakaran was called for questioning at 5 PM on Tuesday at the Crime Branch Inter-State Cell office in Chanakyapuri and was arrested around midnight, Praveer Ranjan, joint commissioner of police (crime), said. 

His longtime friend Mallikarjuna has also been arrested after being quizzed for the second day on the trot, he said. Mallikarjuna had been accompanying Dinakaran everywhere ever since Sukesh Chandrasekar, the middleman in the EC bribery case, was arrested, police said. 

The leader of the VK Sasikala faction of the ruling party also claimed he did not know Sukesh Chandrasekhar, a middleman arrested by the Delhi police in this matter. Dinakaran confessed to meeting Chandrasekar on Monday, saying he assumed Sukesh was a high court judge.

The Election Commission had frozen AIADMK's 'two leaves' symbol after the two factions led by Sasikala and former chief minister O Panneerselvam staked claim to it.

The by-poll to the R K Nagar Assembly constituency in Tamil Nadu was scheduled for April 12, but the EC cancelled it, saying the electoral process had been "seriously vitiated" by parties through the use of money power.

Dinakaran was the candidate of the Sasikala faction. The seat fell vacant after the death of then chief minister J Jayalalithaa on December 5.