The incident was reported about 12.30 PM and several teams of police officials were rushed there. Meanwhile, Delhi Fire Services also rushed six fire tenders to attend the call, senior officials said.
"The firecracker exploded at the parking lot in the basement of the lawyer's chamber building," police said.
However, it is yet to be ascertained how a firecracker could explode inside the high-security premises of the city court, a police official said.