Police said these accused were arrested on June 28 and were initially sent to two-day police remand.
Junaid (17) was stabbed when he, along with his brothers, was returning home in Palwal district's Khandawli village after Eid shopping in Delhi on June 22.
Police have so far arrested five persons. Of the five, four arrested on June 28 are residents of Khambi village. The fifth one was arrested earlier.