A three-day police blitz on public knife crime "hotspots" in NSW has ended with the seizure of 61 knives, five guns and a range of other weapons. Police targeted areas known for anti-social behaviour and knife crimes throughout the state including Bankstown Railway Station in Sydney where officers charged a 46-year-old man allegedly carrying a set of knuckle-dusters without a permit on September 21. On September 22 police charged a 31-year-old man after he was allegedly found carrying housebreaking implements and "a large quantity of drugs" while walking along Belgrave Street in Manly. The operation, from September 21 and 23, had140 people charged with drugs, weapons, warrants and bail offences. Police also conducted more than 4,000 random breath tests that resulted in "numerous detections". A 29-year-old woman was charged with drug, licence and dangerous driving offences after a car chase in Arndell Park, Western Sydney ended with police deploying road spikes on September 22. A three-year-old boy was found in a child restraint when officers searched the car, police said. IN OTHER NEWS: Detective acting superintendent Glen Parks said "the feedback we have received from the community about running these operations have been very favourable". "Nevertheless, it is still concerning that we still have a portion of the community who chose to carry knives; and it's particularly concerning that a large number of these are young people. "We see time and time again that carrying knives and other weapons can lead to an increase in violent confrontations. "But rest assured, we will continue to run these operations in the future, so if you plan on carrying a weapon, expect to be caught."