Police have arrested a man straight after he allegedly robbed a service station in Rosewater. After allegedly threatening staff with a steak knife the suspect stole an amount of cash just after 9.10pm tonight. As he left the service station Western Adelaide detectives were nearby at the time of the robbery being called into police and stopped the man trying to leave. The 54-year-old Rosewater man was arrested without incident and taken to the Port Adelaide Police Station where he will be charged with aggravated robbery and appear before the Port Adelaide Magistrates court. – See more at: http://www.sapolicenews.com.au/more-news/18487-rosewater-service-station-robber-arrested.html#sthash.0gX8UW9L.dpuf