AFP they were urgently investigating reports Sunday that kidnapped BBC Gaza correspondent Alan Johnston had been executed. The journalist was snatched at gunpoint last month, triggering protests and campaigns for his freedom. "We've heard of those reports but we don't have any independent verification of them at the moment," a BBC spokesperson said. "Obviously, we are deeply concerned about what we're hearing. We are obviously making urgent inquiries about this because it's of great concern to us to hear those sort of rumours. "No group has claimed responsibility, even to say that he was abducted, so we've never had confirmation...