Six people were held as security personnel raided the house of prominent figure Sardar Uzair Jan Baloch in Lyari, Karachi.
The alleged criminals were held from different spots of the area, while Kalashnikov, SMG, rocket launcher and ammunition in large number were recovered from them.
Pakistan Rangers confirmed the incident, saying the arrested were moved to an undisclosed location.
It may be noted here that this is the third operation within 48 hours to nab criminal element ahead of general elections in the country.