A 25-year-old man arrested on suspicion of the murder of the Hull University student Libby Squire has been released under investigation.

Squire, 21, was last seen alive in February returning home from an evening out. Her body was found in the Humber estuary on 20 March. The suspect was arrested on Wednesday.

DS Martin Smalley, the senior investigating officer on the case, said on Thursday: “Proceedings are active and I would remind people to please refrain from any speculation as the investigation is very much live and continuing.

“There are further inquiries still being carried out and there are constant investigative developments and procedures that are ongoing. The majority of the additional analysis stage is now complete, with a small number still pending final results. A file is being prepared for the Crown Prosecution Service as the investigation progresses.”

He added: “My heartfelt thanks go out to Libby’s parents for their continued understanding and patience. They have been kept informed of all the developments in the investigation and they will always maintain our support.”

Squire’s disappearance prompted an intensive search by hundreds of uniformed officers as well as dog handlers, underwater officers and members of the public.

Hull University put in place extra measures to support students and keep them safe, including organising for students to walk in groups or with security staff if requested.