A 10-year-old schoolboy and his teacher, visiting from Connecticut, were stabbed at breakfast yesterday at a downtown hotel along with two other persons in an unexplained attack by a man wielding an icepick, authorities reported.

The boy, Kevin Staton of New Haven, was listed in fair condition last night at Children's Hospital after undergoing surgery for a puncture wound in the abdomen suffered during the incident at the Harrington Hotel cafeteria.

Willie Freeman, 32, of Hamden, Conn., the teacher, was listed in good condition at the Washington Hospital Center after being stabbed in the abdomen.

Richard Gray, 50, listed at 1436 Howard Rd. SE, was treated at the Washington Hospital Center for stab wounds and released. A fourth person reportedly fled after being stabbed in the incident, which occurred about 7:30 a.m.

Police said a man identified as Chawe Hymm Thom, 47, of no known address, was arrested and charged with assault with intent to kill in connection with the woundings.

Police gave no motive for the incident. An acquaintance of one of the injured men said he told her that he knew of no provocation for the stabbings and that the man with the weapon just "went off."