THE man arrested on suspicion of manslaughter after a man fell off a boat in Poole Harbour remains under investigation.

Dorset Police carried out extensive searches for 24-year-old Sussex man David Haw after it was reported he fell off a RIB in the early hours of Monday, May 2.

READ MORE: Body found in Poole Harbour believed to be David Haw

A man was arrested on suspicion of manslaughter in the days following and police received a report at 1.37pm on Saturday, May 14 that a body had been found in the water in the harbour.

Providing an update, A Dorset Police spokesperson said the 19-year-old man from Southampton who was arrested remains released under investigation.

No other arrests have been made, they added.