Police cordons could be seen at two of Ipswich's biggest parks yesterday morning.
Police were called out to Chantry Park after a report of a man in the fishing lake at around 8am.
The air ambulance attended and flew the man to Ipswich Hospital and he was pronounced dead at 10am.
Police say the death of the man in his 20s was not suspicious.
It is thought he had a medical attack that caused him to fall into the water.
On the same morning, police were also called to Christchurch Park after a teenage girl was victim to a serious sexual assault.
A spokesperson for Suffolk police said: