Fashion designer and the girlfriend of Mick Jagger L'Wren Scott has been found dead in her New York City apartment.

According to a BBC report, 49-year-old Scott was found at 10:00am local time by her assistant.

Although the medical examiner has yet to determine an official cause of death, police are treating it as a suicide

A spokesman for Mick Jagger said the singer was "completely shocked and devastated" by Scott's death.