KARACHI – An alleged target killer has been arrested from Pirabad area of the City on Monday. While four criminals were arrested from Orangi Town for their involvement in robbery incidents.According to police officials, an alleged target killer involved in target killing incidents in Pirabad has been arrested. The accused has killed a man in Orangi Town in 2009. Meanwhile, SSP Orangi Town claimed that at least four criminals were arrested in an encounter.SSP said that police also recovered pistol, jewelry, mobile phones and cash  from the arrested criminals. Meanwhile police has arrested 15 gamblers in a raid at a gambling den in Mujahid colony of Nazimabad area.According to police, Nazimabad police has arrested 15 gamblers from Mujahid Colony.Police recovered cash, gambling money and other valuables from them.