Efforts are underway to nab the alleged mastermind Pulsar Suni and another accused V P Vigeesh.
Manikandan has been taken into custody from Palakkad, about 144 km from Kochi, on Monday night, police sources said. However, his arrest has not been recorded so far.
Manikandan, a native of Thammanam in Ernakulam, had moved an anticipatory bail application in the Kerala high court along with Suni and Vigeesh, claiming that they had been "falsely implicated" in the crime on the basis of the "confession" statement of Martin, the driver of the actress.
When the bail plea came up for hearing on Tuesday, the high court postponed the matter to March 3.
Meanwhile, forensic experts have collected evidence from the car in which the actress was harassed by the gang members.
So far, three persons -- Vadival Salim, Pradeep and Martin -- have been arrested in connection with the case, police said.
All the three have been remanded to judicial custody by a magistrate court in Aluva.
Kerala Chief Minister Pinarayi Vijayan, who spoke to the actress over phone yesterday, has promised stern action against those responsible for the February 17 incident.
The actress was allegedly harassed inside her car for two hours by her tormentors, who had forced their way into the vehicle, before vanishing in a busy area in Kochi.
IMAGE: Police inspects a car in which the actress was molested. Photograph: ANI
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