Censor.NET reports citing Reuters quoting Vyacheslav Pavlyuchenko, who served with Bordov.
"They were caught in shell fire. Two of our Russian servicemen and two Syrian soldiers died," Pavlyuchenko said.
He said the shelling incident happened on Tuesday and that he did not know the names of the other fatalities.
Bordov is one of the most high ranking Russian officers to be killed in Syria. He was in command of a reconnaissance company two years ago, Pavlyuchenko said.
According to him, Bordov's body is expected to be delivered to his military unit in the Crimean town of Sevastopol on Friday and he is expected to be buried in his hometown of Simferopol on Saturday.
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