According to police, the duo, identified as Amit Gupta and Rahman, was today arrested for their involvement in the crime.
Police said the accused uncle Amit Gupta had kidnapped Vashu for ransom of Rs 30 lakh, adding that police was also investigating the possibility of personal enmity between the two families.
Vashu had been found murdered near a drain at Waziarabad, a day after the duo had allegedly kidnapped him while he was playing outside his home in Brahmpuri Colony.