Complex sentence: Anton Gerashchenko, an official with Ukraine's Interior Ministry, said that the name of the gunman was Pavel Parshov who was planted by Russian services as an undercover agent into the National Guard of Ukraine.
Split into simpler sentences: Anton Gerashchenko, an official with Ukraine's Interior Ministry, said that the name of the gunman was Pavel Parshov. He also said that Parshov was planted by Russian services as an undercover agent into the National Guard of Ukraine.