The mother of missing student Libby Squire has made an emotional appeal to her daughter to get in touch as the search for her entered its fourth day.
Lisa Squire told the 21-year-old University of Hull student in a video appeal: "It is breaking my heart not knowing where you are."
Miss Squire has not been seen since late on Thursday night.
Her parents issued the statement through Humberside Police on Monday as police scoured a waterway and searched bins and drains near the student's home on Wellesley Avenue in Hull.
Mrs Squire said: "We just want to know that you are safe.
"Please get in touch with us any way you can."
By Amy Murphy, Press Association