Word was received here yesterday concerning a terrible explosion which occurred in a mill at Manchester, N.H. in which two persons were killed, one a New Brunswick man. Several others were badly injured. About 9:30 o'clock Thursday morn. the fly wheel in the engine room of the mill burst. Samuel BUNKER, the engineer, was killed outright. He was found shortly afterwards in the wheel in the pit with his head smashed in. Bunker was a married man and a native of Tracy (York Co.) N.B. His remains were interred at Manchester.