The North East Counter Terrorism Unit says one of the two men being questioned about incidents surrounding Newcastle University has now been released on bail.
The student, aged 18 and from Russia, had been arrested in Newcastle on Wednesday on suspicion of offences under the Explosives Act.
A second student, also aged 18 and from Russia, was arrested in London on Tuesday on suspicion of offences under the Terrorism Act.
He remains in custody.
Buildings at Newcastle University were evacuated, and the area sealed off, after police searched a room in a halls of residence and discovered explosives.
These were safely detonated on the Town Moor by bomb disposal experts.
An 18-year-old Russian student has been charged with making an explosive substance after a bomb scare at Newcastle University.
Officers gave this update, which we are publishing in full, into an investigation at Newcastle University.
An 18-year-old man is still being questioned by police following yesterday's evacuation of Newcastle University. He was arrested in London.