Murder of MQM leader and his son is an open terrorism, he regretted.
In a statement, the MQM chief said religious leaders and professionals were being killed in an organized manner by criminal elements.
He expressed condolence over killing of MQM leader and former councilor in Orangi Town.
A former councillor of the MQM and his son were gunned down in Orangi Town earlier in the morning.
Unidentified gunmen opened fire at a hotel near Sabri Chowk in Orangi Town sector 11 leaving a former councillor Abdur Rasheed and his son Adil dead.