Police and Coastguard teams are to resume a search for a man missing in the sea off Ramore Head in Portrush.
The 38-year-old is thought to have been swept off the rocks by a wave at around 4.25pm on Saturday.
An extensive air and sea search was called off at around 8pm last night due to poor light.
Meanwhile, in Portstewart yesterday a 45-year-old man was rescued from the sea by Coastguard
helicopter after going into the sea at the harbour at around 6.15pm.
He was taken to hospital where his condition is thought to be critical.
Police warned some members of the public at Ramore have placed themselves in significant danger by entering the water or attempting to search independently of police and coastguard crews.
A spokesman said: "Police understand that people want to help however we would ask that for their own safety members of the public allow only properly trained and equipped police and coastguard personnel to conduct the search.
"Deteriorating weather and sea conditions mean that the search environment is extremely challenging and police do not want to see anyone put at risk.
"Any properly trained and equipped volunteers who have already attended should make contact with police at the scene prior to attempting any kind of search activity themselves."
The search has ended for the day because stormy winds made conditions too dangerous to continue, police said.