Power is being restored to the last homes hit by a five-day blackout in Germany's snow-covered capital, Berlin.

The outage was caused by a suspected arson attack and came as temperatures dipped below freezing.

It is reportedly the longest blackout in the capital's post-war history. A far-left militant group has admitted being behind the attack.

This week's images of residents - young and old - enduring a prolonged blackout have reignited a debate about Germany's vulnerability to sabotage attacks, whether by domestic or foreign actors.

Schools, hospitals, and care homes were among the tens of thousands of properties affected in south-west Berlin.

In Berlin's Steglitz-Zehlendorf district, police drove around announcing the imminent return of power over a tannoy.

Residents regularly approached emergency service workers for updates, expressing feelings of being 'lost' due to the power outage.

The elderly have particularly felt the strain. Reinhold, 79, shared, I always came back to sleep here even in the cold weather with a bobble hat on and sweater. He is no stranger to hardship, having been born in post-war Germany.

Resources have been pulled from across Germany as the electricity restoration unfolds step by step, with an estimated 100,000 people affected. Hospitals activated emergency generators, and some schools had to close.

The situation began early Saturday when cables on a bridge near the Lichterfelde gas-fired power plant were seen burning. The group Vulkangruppe claimed responsibility, citing fossil energy industry targets.

Federal prosecutors are now investigating the incident as a terrorism offense, potentially including charges for sabotage and disruption of public services.

Germany is actively reviewing its critical infrastructure protection measures, with a new federal law proposed to enhance security against such vulnerabilities.