Acting on a tip-off, police arrested Deepak Bhati, resident of Jehangirabad and his brother-in-law Lavish resident of Haryana, SP(rural) Sanjay Singh said
The injured persons have been admitted to a hospital, he added.
Bhati, who is a murder accused, injured himself while loading his gun in village Habibpur. Two pistols, four cartridges and two robbed cars were seized from them, police said.
Yesterday, Bhati had managed to flee away after an encounter with police in Dadri, they said.
The criminals have confessed to several car robberies, police said.