Specialist officers are examining a property in Mill Street following an 'unexplained death'.
Officers carried out a welfare check this afternoon (10 December) at a flat on Mill Street.
They found a deceased man inside, believed to be 53 years old.
A crime scene cordon is in place, and detectives want to speak to anyone with information.
The Criminal Investigation Department can be contacted on 01481 222 222.
Guernsey "largely unscathed" by Storm Austen
"No serious incidents" were reported in Guernsey during the first storm of the season.
Commodore Clipper breaks mooring ropes in Storm Austen
A video circulating on social media shows Brittany Ferries' Commodore Clipper drifting in stormy weather.
70 mph winds batter Guernsey
Alderney records even stronger gusts of 75mph from Storm Austen.
Haut Du Mont: Jury fails to reach verdict on third gas worker
A jury has failed to reach a verdict on a third gas worker accused of unlawfully killing ten people following the explosion at Haut du Mont nearly four years ago.
Schools in Guernsey to close for Storm Austen
The States has taken the decision to close schools as Storm Force 10 winds are forecast for the Friday commute.
States of Guernsey 'carefully monitoring' forecasts for Storm Austen
A decision is expected later today (22 October) on whether to suspend public services like schools and buses.
Haut du Mont: Gas workers convicted of manslaughter
Two gas workers have been found guilty of unlawfully killing ten people following a fatal explosion in St Helier in December 2022.
Guernsey government websites go offline amid security concerns
Many dot gg websites are inaccessible, following international warnings about a security weakness in web software.
