Jammu, Mar 7 (IANS); At least one person was killed and 30 others were injured on Thursday when a grenade flung under a parked bus by a militant exploded at Jammu's main bus stand. The attacker was arrested within hours.

Jammu and Kashmir Director General of Police Dilbag Singh told reporters that police had arrested Yasir alias Arhaan of Kulgam district in the Kashmir Valley who had thrown the grenade.

"He was caught while trying to flee from the explosion site," he said.

The thunderous explosion occurred around 11.30 a.m. when the General Bus Stand, as it is known, was teeming with people.

Inspector General of Police Manish Kumar Sinha said the grenade rolled under the parked bus that was headed to Uttarakhand.

The explosion also injured passengers in a nearby parked bus which was set to leave for Amritsar in Punjab.

One of the badly wounded civilians succumbed to his injuries in a hospital, Sinha said. He has been identified as a 20-year-old man from Uttarakhand.

"Four others have suffered critical injuries," a police officer said.

Some witnesses said they initially thought the sound had been caused by a tyre burst.

"At first, we thought it was a tyre burst. But when we approached the site, we saw people lying injured and in critical condition," said Sunil Kumar, 26.

Thursday's is the third such attack at the Jammu General Bus Stand by militants in the last nine months.