The third day of a police search operation of the River Lagan in Belfast has ended.
The operation began after the emergency services were told a man was seen near Queen's Bridge at about 1600 BST on Saturday.
Police are also investigating a member of the public's claim to have seen a man seen emerging from Belfast Lough at Whitehead about an hour later.
It is believed the man had a backpack and was wearing dark-coloured clothes.
A member of the public said a man, who matched the police's description, was seen about six miles along the coast, walking towards Newtownabbey.
Appealing for information, a police spokesman said anyone who either saw someone matching that description or who was missing a loved one should contact detectives.
The police helicopter and divers went to the scene on Saturday afternoon and the Lagan Weir was closed overnight.
It is understood the river bed and the surrounding area was dragged by Belfast Harbour Commission.