Lindsay Lohan was scheduled to enter rehab on Thursday morning to begin her 90 days of court-ordered treatment. But the troubled starlet is reported to been 'spooked' by the amount of paparazzi waiting outside the Morningside Recovery in Newport Beach, and refused to check into the facility. Law enforcement sources now tell TMZ that prosecutors will seek an arrest warrant for Lindsay Lohan if she's not back in rehab by sunrise. A source told Radar that Lindsay has apparently been saying for the past six hours that she is 'going to return to the rehab facility but she hasn't yet.' 'She felt Morningside was not suitable for her,' another source told Us Weekly about Lindsay's decision to leave. 'There were too many paparazzi everywhere and she didn't feel safe. 'Nobody close to her is happy about this. They think she's really not being smart.' RadarOnline, reports that Lindsay did in fact walk through the doors of the facility, but left just a few minutes later. 'She told people there that she didn't need rehab,' a source told Radar. 'And then she left. Everyone was stunned.'