Mr Pathmanathan became the leader of the remnants of the Tigers after their defeat in May by Sri Lankan forces.
BBC: New Tamil Tiger head is arrested
2.
Mr Pathmanathan is now in the custody of the Sri Lankan authorities after reportedly being picked up earlier in a south-east Asian country.
BBC: New Tamil Tiger head is arrested
3.
Thai government spokesman Panitan Wattanayagorn denied Mr Pathmanathan was arrested in his country but conceded there were "reports that he has been travelling in and out of Thailand".