Three Dorchester men and their Quincy associate were held on high bail today in connection with an early morning stabbing that left a Boston man in critical condition, Suffolk County District Attorney Daniel F. Conley announced.

Arraigned in the Boston Municipal Court this afternoon for assault and battery with a dangerous weapon were:

1. MICHAEL MULLEN (D.O.B. 11/26/86) of Quincy, held on $30,000 cash bail and represented by attorney Michael Mullen;

2. CONNER LEARY (D.O.B. 9/12/88) of Dorchester, held on $10,000 cash bail and represented by attorney Pam Morris;

3. JAMES McLAUGHLIN (D.O.B. 7/30/87) of Dorchester, held on $10,000 cash bail and represented by attorney Stanley Helinski; and

4. DANIEL WALSH (D.O.B. 8/23/87) of Dorchester, held on $10,000 cash bail and represented by attorney Paul Mishkin.

Assistant District Attorney Philip O’Brien told the court that Boston Police officers responded to a call for a stabbing on Friend Street at about 12:30 this morning and found emergency medical technicians attending to the 21-year-old victim, who had suffered stab wounds to his chest, abdomen, and left arm.

Multiple witnesses told the officers that a fight among several white males had broken out in a nearby apartment building and spilled out onto the street. Witnesses also described two of the assailant.

Additional officers aware of the incident stopped a taxi cab on nearby Causeway Street on noticing that it contained four white males, some of whom had bloody noses and facial abrasions. The officers ordered those men out of the cab, prompting witnesses to exclaim, “That’s them.”

The officers separated those men, examined the cab, and observed blood to be on their clothes and inside the vehicle. The occupants – Leary, McLaughlin, Walsh, and another man who was not involved in the fracas – were then transported to the Boston Police District 1 station for interviews. During that time, Boston Police detectives learned of Mullen’s alleged involvement in the incident.

Boston Police made contact with members of Mullen’s family, who assisted them in locating Mullen at his home in Quincy early this morning. A search warrant led to the recovery of Mullen’s clothing, on which was found a substance believed to be the victim’s blood.

The victim was transported to Massachusetts General Hospital for treatment; his condition was critical last night but improved after hospitalization and he is now expected to survive.

The defendants will return to court on Oct. 22.