Was Saint John the evangelist in Jerusalem in 70 AD when Rome invaded Jerusalem?

There is no definitive historical evidence to confirm that Saint John the Evangelist was in Jerusalem during the Roman invasion in 70 AD. Early Christian tradition suggests that he may have moved to Ephesus by that time. However, some accounts indicate that he could have been present in Jerusalem before the siege, but these are speculative and not well-documented. Thus, his exact whereabouts during the invasion remain uncertain.