Missing student warned of 'creepy man" who was following her into pubs North Yorkshire Police said they were aware of the messages but that they were not linking them to her disappearance. Efforts on Tuesday were focused on the river. Supt Phil Cain said: "At this stage there's nothing to suggest there is any criminality involved in relation to Megan's disappearance." Officers have traced the five friends who were seen with Miss Roberts, but they have not been able to account for how she became split up from them. Other students assumed she had gone home to Wetherby, North Yorks, for the weekend or gone to see a former boyfriend, and, although they were concerned she was not answering her telephone or using social media websites, she was not reported missing until Monday when she failed to turn up for lectures. The place where she was last seen leads only to Lendal Bridge or down to the fast-flowing Ouse. There is no sign of Miss Roberts on the footage returning the way she came. On Tuesday police divers scoured the river, which is about 20ft deep, while two boats equipped with specialist search technology monitored them. The case has raised memories of the disappearance of Claudia Lawrence, a 35-year-old chef who vanished in the city in 2009. Although police ruled out a link, Miss Lawrence's father, Peter, said on Tuesday that Miss Roberts's disappearance had bought back memories. "I heard the news and my first thought was Claudia, as it always is," he said. Then, the immediate thought is for the distress this is causing another family. Mr Lawrence said he had passed on his thoughts to Miss Roberts's family via the Missing People charity. Family liaison officers were with Miss Roberts's mother Jackie on Tuesday, and officers have been in contact with her father. She also has a younger brother and sister. Police said that Miss Roberts, who lives in the Clifton area of York, had not followed her usual route home after leaving the Popworld bar, and that they had no evidence to suggest she was intoxicated when she vanished. Twitter fears 'He asked where we were going Megan Roberts: Can't believe a guy just followed us from one pub to another and came in and sat down next to us, staring at us like it was completely fine Rockie Thornley (retweeted by Megan): The bar staff have just noticed our stalker and come to tell us that they won't be serving him any more and not to worry we are safe Sat in a different pub and the creepy guy has just turned up and sat with us and said 'can't believe you are here. Go away creep Me and Megan got up to leave and creepy guy asked us where we were going, even though he hasn't spoke to us all night ... ergh creep Megan has gone to the toilet and this creepy guy keeps staring at me and winking, probably gonna get murdered tonight and it's only 8pm