UN Secretary-General Ban Ki-moon on Wednesday strongly condemned the bomb blast, which occurred in the Indian national capital in the morning and left 11 people as dead and 91 injured, Xinhua reported.
The UN chief also expressed "solidarity with the government and people of India".
The explosion occurred around 10:15 a.m. outside Delhi High Court where about 300 visitors were crowding Gate 5 for passes to enter the complex. Several people died instantly while others collapsed.
A statement issued from the UN chief's office said: "The secretary-general strongly condemns the bomb attack at the Indian High Court in New Delhi which has killed and injured many today.
"The secretary-general reiterates his firm stance that there is no justification for indiscriminate violence against civilians."
"The secretary-general extends his sincere condolences to the families of the victims and hopes that the perpetrators will be brought to justice," the statement added.