Russia warplanes kill 300 isis fighters

I think there may be some confusion here. Russia has not been involved in a direct conflict with ISIS in the same way that the United States and its allies have. While Russia has been involved in the Syrian Civil War, its primary focus has been on supporting the government of Bashar al-Assad and fighting against rebel groups, rather than specifically targeting ISIS.

That being said, it's possible that you may be referring to a specific incident or operation where Russian warplanes may have targeted ISIS fighters. Could you provide more context or clarify what you're referring to?

It's also worth noting that the exact number of ISIS fighters killed by Russian warplanes is difficult to verify, as the Russian government has not publicly released detailed information on its military operations in Syria. However, according to various reports and sources, including the Syrian Observatory for Human Rights, a UK-based monitoring group, Russian airstrikes have been responsible for killing thousands of ISIS fighters in Syria over the years.