
Police sources said that unknown men riding bike lobbed handed grenade at JI office, leaving two people injured.
The assailants managed to escape.
Police rushed to the site and shifted the injured to hospital. An investigation into the incident has been initiated.
Violence against political parties has increased in recent days with the Pakistan Peoples Party, the Muttahida Qaumi Movement and the Awami National Party have been targeted.
On Saturday at least three people died and 33 others were injured in twin bomb blasts at an MQM election office in Karachi.
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