NEW YORK - NBC Universal says Nora O'Brien, its executive in charge of drama programming, has died.

Spokesman Curt King says O'Brien died Wednesday after collapsing in Sausalito, Calif., on the set of a TV series in development for NBC.

The 44-year-old O'Brien had worked for six years at NBC Universal as an executive at the Sci Fi Channel and, most recently, as vice president of drama programming for the company's studio division.

O'Brien, who lived in Santa Monica, Calif., was a native of West Hartford, Conn.