British / American against Russia in 1945

[Jon]

I read a book a while back about the battle for Berlin and in it it states that near the very end of the war their were several incidents of supposed Allies..British and Russians actually exchanging shots with each other in very tense situations, not friendly fire but deliberate actions,fortunately the officers on both sides appear to have stopped it from getting out of hand.
Did any US or British aircraft ever trade blows with Soviet fighters or bombers just before the end of the war ? They must have come across each other on occasions?