Police in Melbourne have arrested and charged five teenagers in relation to a series of incidents in which they allegedly assaulted, robbed and sexually assaulted men they had lured through dating apps. Those arrested include a 16-year-old boy who has been charged with robbery, armed robbery, obtaining property by deception and intentionally causing injury. An 18-year-old man from Dandenong has been charged with kidnapping, armed robbery, attempted robbery, sexual assault, intentionally causing injury and obtaining property by deception. A second 16-year-old boy has been charged with kidnapping, robbery, attempted robbery and intentionally causing injury. The fifth person arrested, an 18-year-old man, has been charged with robbery, sexual assault and intentionally causing injury.