ABC News: Threat against Obama niece unsubstantiated

COLLEGE PARK, Md. -- ABC News has learned that threats made against President Obama's niece are unsubstantiated.

Leslie Robinson plays on the women's basketball team for Princeton.

Officials stepped up security at the Lady Tigers NCAA tournament game in Maryland Monday night after a report that a threat was phoned in.

Investigators are saying there is nothing of concern at this point.

Princeton lost to Maryland 85-70 on Monday in the second round of the tournament at the Terrapins' arena, the Tigers' only defeat of the season.

President Obama attended Princeton's first round win on Saturday.

He was not at last night's game.