One person was killed and at least 30 people were injured on Thursday by a grenade blast at a bus station in Indian-occupied Kashmir, police said.

“It seems that the grenade was lobbed from outside [the premises] and it rolled under the bus and caused injuries to approximately 18 people,” police official MK Sinha had earlier told journalists.

According to The Associated Press, the injured were taken to a hospital, including at least four who were in critical condition. One person later succumbed in the hospital, medics and police said.

Police said they are investigating who was responsible.

The blast comes amid heightened tensions between India and Pakistan following the February 14 attack in occupied Kashmir's Pulwama area, which killed more than 40 Indian paramilitary soldiers.

Tensions between the neighbouring countries escalated after Indian Air Force (IAF) warplanes violated Pakistan's airspace. The IAF returned unsuccessful after the Pakistan Air Force (PAF) "immediately scrambled" its jets. According to Inter-Services Public Relations (ISPR), the Indian aircraft released their payload "in haste" as they returned.

PAF the next day, on Feb 27, targeted non-military targets across the Line of Control to demonstrate Pakistan's aggressive capabilities, and shot down two IAF jets after they crossed the LoC.