A 21-year-old woman has gone missing since leaving Blackburn College on Thursday.
Police said Rehana Riaz's family were very concerned and appealed for information about her whereabouts.
Rehana, of Whalley Range, was last seen leaving Blackburn College at around 1.50pm wearing an emerald green blouse, silver cardigan, black trousers and black heeled shoes.
Police said she was known to have links with Northampton, Bristol and London.
Inspector Pete Zsigmond from Blackburn police said: "It is out of character for Rehana to have no contact with her family for this long and understandably they are growing concerned for her welfare and want to know that she is safe and well. "
Anyone with information should contact Blackburn police on 01254 51212 or Crimestoppers anonymously on 0800 555111.
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