ITV News Correspondent Rupert Evelyn says Cardiff practically devoid of anyone not connected with the Nato summit.
Cardiff like a ghost town this morning. A city for world leaders, police, protestors and journos only today?
Police have been patrolling Cardiff Bay as part of the massive security operation surrounding the Nato summit in nearby Newport.
A leading security consultant said the Nato summit in Newport will be one of the "biggest security operations" in the UK.Read the full story ›
ITV News Wales and West of England Correspondent Rupert Evelyn reports:
The 18-year-old man from the Grangetown area of Cardiff who was arrested earlier today under Section 5 of the Terrorism Act has been released on bail, police said.
An 18-year-old man from Grangetown in Cardiff has been arrested on suspicion of terrorism offences.
South Wales Police say he has been arrested under the Section 5, Terrorism Act 2006 for assisting in the preparation of an act of terrorism.
Police said that today's arrest was not linked to any immediate threat to public safety.
Four men have been arrested in Cardiff by detectives investigating slavery and kidnap allegations, Gwent Police said.
An operation involving three police forces saw warrants executed at five addresses in Bristol and Cardiff this morning. Four men from the Rumney area of the Welsh capital were arrested.
Police working on Operation Imperial are probing alleged offences of slavery, forced labour, false imprisonment, kidnap and assault.
Lead officer Detective Superintendent Paul Griffiths said: "The alleged offences we are investigating are extremely serious and we would urge anyone with any information which could assist to contact the Imperial team directly."
South Wales Police has confirmed that a 22-year-old man has been arrested on suspicion of murder after the death of 45-year-old Darren Thomas, an inmate at Cardiff Prison.
Prison sources have told the Press Association the man arrested following the death of an inmate at Cardiff Prison is a serving prisoner.
It remains unclear at present what the arrested man's status is and what wing the police's investigation centres around.
South Wales Police say the death of the 45-year-old inmate is being treated as 'suspicious.'
South Wales Police says the death of a 45-year-old inmate at Cardiff Prison yesterday is being treated as 'suspicious.'
A 22-year-old man has been arrested and is in custody.
South Wales Police is investigating the suspicious death of a 45-year-old inmate at HMP Cardiff during the early hours of Thursday, March 6.
A 22-year-old man has been arrested and is in custody at Cardiff Bay Police Station.
The HM Coroner has been informed and an investigation is continuing.