DUESSELDORF, Germany, March 12 (Reuters) - German

policymakers should come on board with grid operators to step up

responses to incidents such as the arson attack near Tesla's

gigafactory near Berlin, said the head of Germany's

Westenergie, parent to a weighty grid firm.

Security measures needed reviewing and a better legal

framework created, Chief Executive Katherina Reiche told

reporters in Duesseldorf.

"Critical infrastructure is vulnerable," said Reiche, whose

subsidiary Westnetz dealt with restoring tens of thousands of

households in western Germany with power after flooding in 2021.

But a rethink was necessary over what to do against

deliberate and targeted actions by humans.

In the Tesla case, far-left activities from the Vulkangruppe

claimed responsibility for the attack that caused a week-long

outage at its Gruenheide factory in the state of Brandenburg.

"It is probably not possible to protect such a network to a

100% degree at all times," Reiche said, adding that gas and

telecommunications intersections were also exposed to attacks.

Transparency rules requiring grid operators to make their

infrastructure data publicly available might be in need of

review, she said, as they could potentially identify and provide

pointers to where to find targets.

Westenergie belongs to utility group E.ON.