The court asked NBCC to "stay its hands" till July 2 .
Kumar was convicted and sentenced to life for the remainder of his life by the high court on December 17 in the 1984 anti-Sikh riots in Raj Nagar area.
The former Congress leader had sought more time, till January 30, to surrender saying he has to settle family affairs related to children and property and also needs time to file appeal in the Supreme Court against the high court verdict.
Ahmed, 27, a student of School of Biotechnology at Jawaharlal Nehru University went missing on October 15 following an on-campus scuffle allegedly with members of ABVP.
Leaders from all political parties welcomed the conviction of Congress leader Sajjan Kumar in a case related to the 1984 anti-Sikh riots.
The CBI, after more than a year of investigation, was of the opinion that no offence was committed against the missing student.
The Delhi high court freed Navlakha from house arrest on Monday, five weeks after he and four other rights activists were arrested in connection with the Koregaon-Bhima violence in Maharashtra.
At a press conference, the NBCC CMD defended the move, saying it is a sacrifice that one has to make for development and they would be compensating by increasing the green cover 15 times.
The Delhi HC termed the massacre "targeted killing" of unarmed and defenceless persons by the police.
Ilyasi's daughter Aaliya, who was present at the time of pronouncement of the verdict, expressed happiness and said she always had trust in her father.
The Delhi high said that the trial court order was unsustainable in law.
Najeeb went missing from JNU's Mahi-Mandvi hostel on October 15 allegedly after an on-campus scuffle between him and some members of the Akhil Bhartiya Vidyarthi Parishad. The ABVP has denied involvement in his disappearance.
Concerned over continued disappearance of a Jawaharlal Nehru University student for nearly two months, Delhi High Court on Wednesday directed the police to "scan" the entire campus, including hostels, classrooms and rooftops, of the varsity by using sniffer dogs.
Nearly 40 years after the then railway minister Lalit Narayan Mishra was killed in a bomb blast at a function at Samastipur Railway Station in Bihar, a Delhi court on Monday convicted four persons for the charges of murder and criminal conspiracy.
Sharmila had claimed that the family has been unable to contact her husband for last three days.
The Delhi high court called the anti-Sikh riots case "communal frenzy" after the then prime minister Indira Gandhi was assassinated by her bodyguards.
Four men, convicted for killing the then Railway Minister Lalit Narayan Mishra and two others in a blast in Bihar's Samastipur railway station nearly 40 years ago, were on Thursday awarded life imprisonment by a Delhi court.