The National Crime Agency has joined the desperate search for a missing student nurse - as mystery continues to surround her sudden disappearance six weeks ago.

Owami Davies, 24, was last seen on London Road in Croydon, south London, walking towards the Norbury area at around 12.30pm on July 7.

The last sighting was three days after the Kings College student left her family home in Grays, Essex, on July 4. 

But she has not been since amid growing concern over her welfare, while the National Crime Agency (NCA) has now joined the missing persons case and is trawling through six reported sightings of her.

A statement said last night: 'Specialists from the NCA's Major Crime Investigative Support command are assisting this investigation led by the Metropolitan Police.

'Please contact them if you have information that can help trace Owami Davies.'

The Met has also revealed that she was possibly spotted in Croydon 'in the days after she was last seen' and say she could still be 'in the local area and in need of help'. 

CCTV footage released by police from July 7 showed Owami wearing a dark jacket, red t-shirt, light grey joggers and slider type shoes. She also had a white handbag over her shoulder.

Officers have downloaded around 50,000 hours of CCTV and have viewed 10,000 hours of footage as part of efforts to verify the sightings.