Alexandra O'Brien's body recovered from River Foyle in Londonderry

Irish coastguard helicopter
Image caption Coastguards from Sligo are assisting in the search

The body of a 21-year-old woman has been recovered from the River Foyle in Londonderry.

Alexandra O'Brien's body was found on Thursday afternoon during a search by the Foyle Search and Rescue team.

Rescue workers are continuing to search for 18-year-old Kieran McKeon, who is believed to have been with Ms O'Brien when she disappeared.

The team that recovered her body was assisted by the PSNI helicopter and Sligo coastguard.

Craig Smith from Foyle Search and Rescue said the search began on Thursday after personal belongings were found on the Foyle Bridge.

Image caption Kieran McKeon, 18, was last seen in Derry on Thursday morning

"We searched until about 10:30 GMT on Thursday and resumed a search at 14:00 GMT, which unfortunately led to a body being recovered around 5pm last night," Mr Smith said.

"We were assisted by the PSNI helicopter and the Sligo coastguard who located the body for the teams to go in to recover."

Mr Smith said recovering a body was one of the "saddest tasks" that crew members had to face.

"This year we have actually saved five people's lives since 1 January from the river and this is the first body in 2013," he said.

Mr McKeon, who is from the Republic of Ireland, was last seen in Derry in the early hours of Thursday morning.