QUETTA: At least four political workers were killed and 13 others injured in a bomb blast at Quetta’s Jinnah Road, officials said late Thursday

The explosion occurred as the workers from JUI Nazriati party were leaving a venue following a conference in Quetta, which is home to several separatist and Islamist insurgencies.

“At least four political workers were killed and 13 others injured,” Fida Hassan Shah, a senior police official, told AFP. “It was an improvised explosive device and some 1.5 kg of explosive was used,” he added.

Javed Akhtar, an official with Sandeman Hospital also confirmed the death toll to AFP. No group has yet claimed responsibility for the attack which the chief minister of the province, Mir Abdul Qudoos Bizenjo, called an “act of terrorism”.

Witnesses told the police that glass windows of buildings situated in the vicinity of the blast were shattered.