After being arrested from Bhubaneswar by a police team from Jatatsinghpur, Sahu was taken to Kujanga near here and produced before a court which remanded him to judicial custody for 14 days, police said.
"Sahu, who was to leave for Coimbatore in Tamil Nadu, was arrested from Bhubaneswar by a police team shortly before (the) departure of his flight," Deputy Superintendent of Police (Paradip) Bhabani Shankar Mishra said.
Jagatsinghpur Superintendent of Police Satyabrat Bhoi said Sahu's arrest had no link with the ongoing work for Posco project. He said the anti-Posco leader was arrested under different provisions of the IPC and Explosives Act.
There are a total of 55 cases of different nature against Sahu, he said, adding that the PPSS leader had obtained bail in 53 cases and the arrest was made mainly in connection with a bomb explosion at Patana village which had claimed three lives on March 2 this year.
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Vowing to continue the fight against the mega project proposed by the South Korean steel major, the PPSS leader said he was to take a flight to Chennai to attend the conference but police arrested him before his departure.
Sahu, who has been leading an agitation under the banner of PPSS against the mega steel project since 2005, has been arrested earlier also in connection with various offences.
The administration was taking measures for development of Dhinkia grampanchayat, considered to be the epicentre of the anti-Posco agitation, and the people of the area were also in touch with them, sources said.