It is the explosions at the Nord Stream 1 and 2 gas pipelines that have led to further concerns about the electricity supply.

Säpo and the Energy Agency have sent letters to grid companies and electricity producers asking them to increase their attention.

They also plead for the actors to "further increase their detection capabilities".

- We go out and talk about increasing vigilance regarding central infrastructure in Sweden.

The energy sector needs to take measures to protect what needs to be protected, says Karl Melin, press manager at the Security Police.

In addition, they want network owners and electricity companies to increase reporting to the Security Police, even of small deviations.

Increased vigilance

Already in connection with the outbreak of the war in Ukraine, the Energy Agency, in consultation with Säpo, called on actors in the electricity sector to increase both their vigilance and their reporting.

Now – after the explosions in the Baltic Sea – they want to see further measures.

The fact that energy systems such as gas pipelines in our vicinity are attacked directs even more focus on the electricity supply, says Erik Nordman, head of security at Svenska kraftnät.

- It stands out.

It was very dramatic.

When such an event occurs near our operations, we are extra vigilant.

Säpo does not want to say whether attempts at sabotage have already been revealed.

But Karl Melin points out that illegal cyber attacks against Sweden and attempts to gather intelligence are constantly ongoing - and have increased in recent years.

Huge amount of wires

The electrical system is large.

Facilities such as nuclear power plants already have rigorous surveillance.

Svenska kraftnät has 1,700 miles of power lines across the country, a system that is built so that the electricity has several different paths to arrive at, but is therefore difficult to monitor.

Strengthening protection and vigilance can mean more surveillance cameras, more guards and increased protection around both physical locations and digital systems.

- It could be about increasing surveillance around critical infrastructure - it could also be IT systems.

What is clear is that we have a more serious security situation now, says Erik Nordman.