From the Somerville Police:

At about 11:45 p.m. Sunday night, a Boston Cab Company driver was stabbed and robbed on Powder House Blvd. in Somerville.  The cab driver, Ali Hanadi, is a fifty year old resident of Medford.  Hanadi was transported by ambulance to Massachusetts General Hospital where he is listed in critical condition.

Shortly after this robbery, Somerville Police arrested RAPHAEL CAMINERO, age 19, outside his residence on Powder House Blvd.  He was identified by a witness to the robbery.  Caminero has has been charged with Armed Assault with intent to Rob and Murder. 

Caminero will be arraigned later this morning in Somerville District Court.