Troubled star Lindsay Lohan is facing further press embarrassment with the publication of photos showing her holding a knife to a pal’s throat.

Last month (May07) Lohan was reportedly left “inconsolable” when a tape leaked to British newspaper The News of The World appearing to show the actress snorting cocaine with friends in a Los Angeles club bathroom.

Now the same newspaper has printed disturbing photos of the star - currently in rehab - at a house party four months ago (Mar07). In some shots she slides a knife towards a friend’s neck, before holding the point towards her own mouth in others.

Last week (30May07) some of the actress’ close pals approached America’s Star magazine with tales of her increasingly bizarre behaviour, and fears she may be harbouring suicidal thoughts.

Meanwhile the troubled star Lindsay Lohan has been leaving her rehab facility on several occasions - to workout at her local gym.

The Mean Girls actress was criticised earlier this year (07) when she repeatedly left her rehab program at Wonderland to make several personal outings - and she has already left the Malibu based rehab facility Promises three times to workout since she checked in last Monday (28Apr07).

A spokesperson for the rehab center confirmed to Access Hollywood the actress left the facility, saying, “Yes, Lindsay went to the gym.”