Victim identified as Edward Sanchez of Worcester.
Boston Police report a man in his 50s was found stabbed at 112 Southampton St. shortly after noon. He was taken to a local hospital, where he was pronounced dead.
This was Boston's 19th murder this year.
It's the second violent knife incident in Newmarket Square in recent days. On Friday, police arrested a man they say pointed a knife at officers and then tried to escape -- despite being sprayed with pepper spray - by carjacking two motorists, only to be dragged 30 to 40 feet by the second car.