State Police have arrested three Greater Danbury area men for an assault and robbery that happened in March in Woodbury.  21-year old Edmon Lasane of Danbury, 19-year old Kyle Morrissey of Danbury and 19-year old Miguel Acevedo of New Milford were charged Friday.  State Police responded to a Main Street North gas station on a report of a 16-year old stabbed multiple times.  The victim said he didn't know the assailants.  He sustained five significant slashing wounds requiring internal and external sutures.  State Police say the victim got a message over social media from someone claiming they wanted to buy an ounce of marijuana.  The men allegedly robbed and assaulted the teen.  State Police reviewed video surveillance and identified the men as Morrissey, Lasane and Acevedo.