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.
New woodland for Alderney's 80th Homecoming
Alderney will get a Royal Visit on 15 December and over the weekend a new area of woodland will be planted out.
Guernsey States 'in talks' with easyJet
Guernsey's Economic Development Committee has confirmed that it is in talks with 'a number of airlines' about island routes.
Guernsey's airline Aurigny takes on six new First Officers
Recruits are the first to come from a partnership between a flying academy, Norse Atlantic and Aurigny.
Call for more transparency over Guernsey Electricity's charges
Thousands complete a survey that calls for price and cost transparency at Guernsey Electricity.
Senior Guernsey politician to stay on committee during police investigation
It has been confirmed that Deputy Gavin St Pier will continue as P&R committee Vice President and Treasury lead while a police investigation continues.
Iconic Guernsey restaurant to close before Christmas
Da Nello in the Pollet has been in business for 47 years but the owners are now retiring.
Protected status of Guernsey bunker changed by planners
The Planning Committee has reversed a decision made earlier this year is to give a bunker protected monument status.
Guernsey's former Chief Minister resigns as deputy after admitting making indecent images of children
Disgraced politician Jonathan Le Tocq has resigned from the States after pleading guilty in Guernsey's Royal Court to all 15 charges against him.
