A CBI team arrested Ghanashyam Mohant (35) and Ranjan Mohant (38) from their villages Gayalmunda and Bhalughera in Keonjhar district, a senior district police official, who assisted in the arrest, said.
Staines and his two sons Philip (10) and Timothy (6) were burnt to death on January 22, 1999, while they were sleeping in their station wagon in front of a church at Manoharpur village in Keonjhar, about 400 km from here.
The incident triggered a global outrage. While the main accused Dara Singh and his accomplice Mahendra Hembram were sentenced to life imprisonment, 11 others were acquitted by a court.
At least three accused in the case went absconding. While the CBI has arrested two of them, the third is still untraced.