This is the Guardian.

Today, an underwater crime and the unexpected place its trail might lead.

On the morning of September 26 last year, there was unusual seismic activity,

detected in a patch of the Baltic Sea near Denmark.

Soon after, Danish authorities issued a warning to passing ships.

Plumes of gas were appearing in different places, forming giant craters on the ocean's surface,

some stretching 700 metres across.

Their initial reports indicated that this made the result of an attack or some kind of sabotage,

but these are initial reports.

We haven't confirmed that yet.

But if it is confirmed, that's clearly not possible.

Submarines sent to investigate quickly discovered the source of the leak.

Sabotage of a network of pipelines that until recently were the biggest source of Russian natural gas

to Europe. They had been blown up and who had done it became a source of global speculation.

And last week, the first real suspects emerged.

This is an extraordinary story. It could have come out of a Hollywood movie.

Danas several books will be written about it in years to come.

You know, you're talking about a kind of daring Commando raid carried out by five men and one woman.

They hire a boat, a Baltic Sea, they dive down, they blow up these gas pipelines,

the Nord Stream pipelines running from Russia to Germany.

And you know what? Nobody knows who did it at the time.

It causes us extraordinary explosions and huge damage.

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