The P.S.N.I. is trying identify the man who pressed an intercom button outside a police station and said "I am going to jump into the Lagan".
The man approached Musgrave P.S.N.I. Station at 4:30am on Wednesday telling police of his intentions.
However, before the police could offer help or identify the man, he left.
"If this was you please contact police on 101," said the P.S.N.I.
If you are affected by any of the issues raised in this story contact Lifeline on 0808 808 8000 or visit their website lifelinehelpline.info or contact the Samaritans on 116 123 (UK) or visit their website samaritans.org