London: Sweden is preparing to issue a public information manual on what to do in the event of war, as debate in the country grows over how to deal with the threat from Russia.

The brochure due to be sent to 4.7 million households will inform the public how they can take part in "total defence" during a war and secure water, food and heating.

Pages out of the 1961-edition of "If the War comes". Credit:Commons

The booklet, with the working title If Crisis or War Comes, will also give guidance on dealing with threats from cyber attacks, terrorism and climate change.

Russia's annexation of Crimea and military support for Ukrainian separatists, along with increased activity and exercises near the Baltic states and Scandinavia, have caused deep unease in Sweden.