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Hello, it's 243 days since Russia began its invasion of Ukraine.

And Ukraine's security service, the SBU, has arrested the head of a Ukrainian company

that makes aircraft engines.

And the reason for the arrest is they say this man has been collaborating with Russia.

The man is called Vyacheslav Bohuslyev,

and his company is called Motora Sitch based in my home city of Zaporizia.

According to the security service, he continued supplying engines and spare parts

to Russian military helicopters, even after Russia invaded Ukraine in February.

And the SBU has also published what it says are intercepted phone calls

between him and various officials in Russia,

in which a voice similar to Mr. Bohuslyev's allegedly discusses ways

of supplying engines manufactured by his company to Russia to help build Russian attack helicopters.

Now, who is Mr. Bohuslyev?

He's one of Ukraine's richest men,

and he used to be a member of parliament for the party of regions,

which used to be headed by President Yanukovych, pro-Russian president,

who was toppled by the protests and is now in Russia.

And years ago, when I visited Motora Sitch, the engine manufacturer in Zaporizia,

I visited the museum of the factory,

and pride of place was occupied by a photograph of Mr. Bohuslyev,

shaking hands with none other than President Putin.

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