George, 32, was killed Aug 21 midnight near Alappuzha while he was travelling with two men, Om Prakash and P. Rajesh, both of whom had criminal records. The police have since arrested K. Satish, who the police claim stabbed George, and 18 others for their role in the crime.

The Congress and the Bharatiya Janata Party have cried foul over the manner in which the case is being investigated and have alleged that police are under duress because of the alleged links between Balakrishnan's son Bineesh Kodiyeri and Om Prakash and P. Rajesh, who were absconding until Tuesday.

The two surrendered before a court in Tamil Nadu Tuesday in a case of attempted murder that took place in 2004.

Kerala Police took Om Prakash and Rajesh into custody Wednesday evening and they were being brought here along with a 12-member special armed police team.