Teams searching for a missing teenager in the River Foyle are now looking for a second man.
It is believed he went into the river on yesterday morning while crews were looking for missing 18-year-old Kieran McKeon.
The body of Mr McKeon's 21-year-old companion, Alexandra O'Brien, was found in the river last Thursday.
Mr McKeon was last seen in Derry in the early hours of Thursday morning.
Stephen Twells is with Foyle Search and Rescue - he spoke earlier on the Shaun Doherty Show: