KARACHI: Operation against criminal elements has been initiated in Lyari area.nnA large number of police and Rangers personnel have arrived in Lyari to begin the crack down on lawless elements, officials said.nnThe security forces have started to set up check posts in the area.nnDirector General Rangers said that anti-terrorist squad of Rangers is taking part in the operation.nnIt may be mentioned here that the gang war, which has been going on in Lyari area for months, has claimed many lives.