Designer L’Wren Scott with Rolling Stones’ frontman Mick Jagger in 2012. Photo: Lucas Jackson/Reuters

Fashion designer L’Wren Scott, found dead in her high-rise Manhattan apartment on Monday, committed suicide by hanging, the New York City medical examiner’s office said.

Police had been treating the death of the 49-year-old former model and stylist who was the girlfriend of Rolling Stones lead singer Mick Jagger as an apparent suicide after finding the her body with a scarf around her neck.

The medical examiner did not release any more details about her death. Her family has yet to announce funeral arrangements.

The Rolling Stones postponed concerts in Australia and New Zealand after learning of her death. The group had been due to start the seven-concert leg of their world tour on Wednesday in Perth, Australia. Fans were told to keep their tickets until further information was released.

Last October in accounts filed in London, Wren’s firm, LS Fashion Ltd, reported a loss of €4.3 million in 2012, an increase from €3 million the previous year.

American fashion critic Cathy Horyn, who had known Scott since the mid-1990s, when she worked as a stylist for photographer Herb Ritts, said Scott was planning to close her business and was going to make an announcement this week.

“Still, as painful as the decision must have been for her, I wouldn’t draw any conclusions from it about her state of mind. Nor should any credence be given to reports of a break-up with Mick. It’s rubbish,” she wrote in The New York Times, where she was fashion critic from 1999 until earlier this year.