A neighbour of Libby Squire has described hearing a "loud and urgent" scream just 20 minutes after the missing student was last seen.

The woman in her 30s told the Daily Mail the scream was so loud that it caused her and her husband to sit up in bed at 12.30am Friday morning.

Police have said they are following up a number of lines of inquiry, including the reports of a "blood-curdling" scream on the night she disappeared.

Humberside Police said they have received hundreds of calls since the 21-year-old University of Hull student was reported missing from the city in the early hours of Friday morning.

As the search entered its fifth day, officers from the police regional marine unit searched a pond at Oak Road Playing Fields, near to Miss Squire's home.

Four officers waded through the waist-deep water, using sticks to break the ice and search beneath the surface.