Could you be kind enough a provide a link to Russian media which report that Syrian government officially denounce the shelling?
Your approach "А чей это сайт?.." implies you don't believe any media could be objective and independent. Which is ok as long as we have what the other party has to say, so we could compare. Al Jazeera has a long-established history of publishing anti-Western and anti-US opinions, so I'm not sure what you want to say here.