Shivu Munishetti and Jadeswamy Rangashettti were sentenced to death in 2005 for their crime against an 18-year-old girl at Bhadranhalli of Chamarajnagar district by the district and Sessions court, which was upheld by the High Court and Supreme Court.
After the Apex Court confirmed the death sentence in 2007, the two had sought Presidential mercy but it was rejected on August 13, 2013.
Officials at Hindalga jail here, where the two are lodged, said on condition of anonymity that preparations are on for the execution and they were likely to be hanged on August 22.
When contacted, a senior jail official declined to provide any details, saying there is a Government Order that no information on the capital punishment should be revealed.
The convicts were brought to Hindalga prison in November 2005. The last execution at the jail was carried out 30 years ago.
There are 36 persons awaiting gallows in the jail, including five associates of sandalwood smuggler Veerappan, who had struck terror in the forests bordering Karnataka and Tamil Nadu before he was shot dead in a joint operation by the two states.