Two Cardiff men have been arrested in after three sex attacks in just five days were carried out in the city centre.

The two men, a 40-year-old and a 22-year-old were both taken to Cardiff Bay police station where they remain in custody.

Earlier today, women in Cardiff were warned to walk in pairs at night in the city centre in the wake of the attacks.

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Detectives were called to Gorsedd Gardens (pictured) in the Welsh capital’s civic centre at around 4.30am today after a serious assault on a woman

Detectives were called to Gorsedd Gardens in the Welsh capital's civic centre at around 4.30am today after a serious assault on a woman.

The crime scene is just a few yards from where a similar attack took place on Sunday - and little over half a mile from another which took place on Tuesday morning.

All three victims are women.

The attacks come during the city's Freshers week, with thousands of new students attending events around the city centre including Cardiff University's Student Union club.

The Welsh capital has also been filled with thousands of visitors for the Rugby World Cup with the attacks happening less than half a mile from the Millennium Stadium.

A woman was attacked around 4.30am today at Gorsedd Gardens and suffered a 'serious sexual assault'

Map of horrors: The three attacks took place withing walking distance of each other, over five days

South Wales Police Superintendent Andy Valentine said while a man had been arrested, inquiries were still at an early stage.

He said: 'While there are similarities in terms of the locations, times and nature of the offences, it is too early to say whether the same man is responsible.

'We are working extremely hard to identify who is responsible and the victims are being supported by specially trained officers.'

Earlier this week, police launched an appeal for information after a 20-year-old woman was sexually assaulted near Cardiff University's main building at 3am on Sunday.

On Tuesday, officers again asked the public for help after a woman was attacked in Cathays Terrace during the early hours of the morning.

Detectives later urged people walking around at night to do so in pairs or groups.

Cathays councillor Chris Weaver said: 'Everyone in the area needs to do all they can to stay safe especially people who are new to the area such as those on freshers week.