A bomb planted on a roadside Tuesday wounded at least 22 people in Pakistan’s south-western Baluchistan province, police and hospital officials said.

The bomb went off near a market in Quetta where a lot of people were shopping ahead of the country’s Independence Day on August 14.

“The bomb was detonated with a timer and was planted near a small roadside stall, Quetta police chief Abdul Razzak Cheema told AFP.

Hospital officials said 22 people were wounded.

“We have received 22 injured, two of them are in serious condition,” doctor Rasheed Jamali at Civil Hospital said.

The blast shattered the window glass of several shops, witnesses said.

No group has yet claimed responsibility for the attack. But Baluch separatists are active in the area and often attack government forces and installations.

Resource-rich Baluchistan is home to a long-running separatist conflict that was revived in 2004, with nationalists seeking to stop what they see as the exploitation of the region’s natural resources and alleged rights abuses.