KARACHI - Unidentified person opened fire at a rally held to express solidarity with MQM on Tara Chand Road in the precincts of Jackson Police Station. According to detail, the rally was taken out by the members of Katchi community to express solidarity with Mutahida Qaumi Movement (MQM). Unidentified culprits opened fire on them, injuring three participants. They were shifted to Civil Hospital Karachi for treatment. The identity of the injured could not be ascertained.