A woman was hit and killed by a Catholic school bus on the Upper East Side on Thursday, police said.

The woman, believed to be in her 40s, was killed at the corner of 93rd Street and Second Avenue at about 3:30 p.m., police said.

The bus was carrying six children, ranging from 5 to 11 years old, from St. Stephen of Hungary School, police said. The children were not injured.

The bus was traveling west on 93rd Street when it struck the woman, who was walking on Second Avenue, crossing the street.

Other circumstances surrounding the accident were not immediately available. The woman's identity was not released. Witnesses said the children were brought into a gym nearby.

The driver of the bus appeared devastated when he was told the woman was dead, said a witness, who asked not to be identified. Second Avenue remained closed to traffic by the early evening.