Father Praveen Mahesan, a Catholic priest, and Ruki Fernando of the Colombo-based INFORM advocacy group were arrested on Sunday in the former LTTE stronghold of Kilinochchi in the north as they met Tamils who lost loved ones during the separatist conflict.
They were detained under Prevention of Terrorism Act for inciting communal disharmony and dissent.
"They were produced last night before the lady magistrate at court No 2 in Hulfsdorp. She ordered their release," police spokesman Ajith Rohana said today.
The governments of the US and the UK as well as several international rights groups had expressed concern over the arrests and demanded their immediate release.
The US has said that proposed international investigation on Sri Lanka's alleged rights abuses has become all the more important given incidents such as the recent arrests.
