MOUNDS VIEW, Minn. (AP) _ A 17-year-old baby sitter bled to death after her throat was slit and she was stabbed more than a dozen times, but the child she was caring for was not injured, police said.

There also was evidence that Tammi Shappell had been sexually assaulted in the attack early Sunday, said James Essling, chief investigator for the Ramsey County medical examiner.

Police issued a nationwide bulletin for a 20-year-old man wanted for questioning. They said he had been dating the victim, a junior at Irondale high School in New Brighton.

A member of Ms. Shappell's family told the St. Paul Pioneer Press and Dispatch that she had met the man at a wedding about eight months ago, and had been dating him since he moved to the Minneapolis-St. Paul area from Kansas about three weeks ago.

Mounds View Police Chief Timothy J. Ramacher said the man had been seen with the girl on Saturday.

The teen-ager's body was found when Michelle Stephens returned to her apartment, where Ms. Shappell had been caring for Ms. Stephens' 1-year-old daughte Amy. The child was not harmed, police said.

Jerry Radman, who lives across the hall from the Stephens apartment, said his 13-year-old son Lloyd heard a woman's scream and a ''thud'' against the wall late Saturday.

Radman said he turned off the television and listened.

''We didn't hear anything (else),'' he said. ''I just thought someone had slapped his wife or something.''