According to Circle Officer Mahesh Mishra, the duo of Ravinder alias Motu and his namesake, bank guard Ravinder, were arrested here last evening.
Mishra said they have recovered Singh's licensed revolver as also the bike which was used in the crime from the duo. He added that one of the accused is?a security?guard at a Punjab National Bank branch.
Prior to yesterday's arrests, another accused, Monu, too, was taken into custody in connection with the case.
Mishra said that police are still looking for two more accused, Gurbir and Rahul, who are absconding.
Forty seven-year-old Singh, also known as 'Fauji', was a retired army man and the vice-president of the BJP unit in Mirapur town.
According to police, he was on a morning walk on June 10 when some assailants fired multiple shots at him. Singh, who had a licensed revolver, fired back at the attackers, injuring one of them. But the attackers managed to snatch his revolver and fled.