Jammu: At least 28 people were injured on Thursday in a grenade blast at the crowded general bus stand in the heart of Jammu.

IGP Jammu, MK Sinha initially said: “It was a grenade explosion, all the injured have been shifted to a hospital”.  “I request everybody to maintain calm,” Sinha told reporters at the site of the blast. “We are chasing all leads”, he added.

The scene of the blast along the B C Road was sealed off by police and a massive hunt has been launched to nab the grenade thrower, Inspector General of Police, Jammu, M K Sinha said.

Windscreens of a parked state road transport corporation (SRTC) bus were damaged in the blast, a police official said, adding condition of one of the injured was stated to be “critical”.

The injured have been taken to the Government Medical College for treatment, reported an Indian news agency. The blast took place around 12 pm.