A man has died after trying to jump onto a boat in Liverpool's Albert Dock.
The 21-year-old is believed to have been trying to get onto the boat with three other people when the incident happened at about 0330 GMT.
Two of them jumped in to try to save him, and one of them was taken to hospital to be treated for hypothermia.
Emergency services were called and Merseyside Police underwater search teams pulled the body from the docks at about 0600 GMT.
The man was taken to hospital to be formally identified.
A police spokesman said the family of the man, who is from Liverpool, have been informed.
He said: "Police are investigating how the death occurred and the circumstances around it and would appeal to anyone who witnessed the incident and has yet to speak to officers to do so."