Here are five points on Pavel Antov:
Mr Antov was chairman of the agriculture committee at the legislature in Russia's Vladimir region, according to Telegraph. He was ranked the country's highest-earning lawmaker by Forbes, with a declared annual income of just under 130 million pounds (Rs 130 crore).
Pavel Antov was also the founder of Vladimir Standard, a major meat producer, according to Telegraph.
He had posted a WhatsApp message in July, calling Russia's missile attack on Kyiv as "terrorism". Mr Antov later withdrew the comment and apologised, claiming that it was a "technical error" and "an unfortunate misunderstanding".
Reacting to the news of his death, Vyacheslav Kartukhin, Vice Speaker of the Regional Parliament, said on its Telegram channel, "Our colleague, a successful entrepreneur, and philanthropist Pavel Antov passed away. On behalf of the deputies of the United Russia faction, I express my deep condolences to relatives and friends."
The 65-year-old was part of the main pro-Putin party United Russia.
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