Union Home Minister Rajnath Singh, while addressing a press conference here, said the leakage has been "plugged."
A team of atomic energy department has also reached the spot, the Home Minister said.
Sources said about four packets, out of the total ten, of a yellow-coloured liquid was suspected to have spread out of its sanitised container after the consignment landed at the cargo area of the airport at about 4:35 AM after which a special squad of the National Disaster Response Force team was called in to check and contain it.
"Radioactive leak very very small. There is nothing to panic and there is no effect on the passenger area," Singh said.
The cargo complex has been vacated by the officials as a preventive measure.
Airport officials said the material was imported for use in medical purpose by a multi-speciality hospital.
The packets, containing the material, bore the markings class-II liquid and a chemical component of Sodium.
