A friend in UK suggested it might have been stolen for scrap by a particular group of people.
The police don't think so, but heck, I've heard of stranger things:
Police in the Czech republic are trying to find out who stole a 4 tonne railway bridge from the border town of Cheb.
Car bridge stolen in Russia's Far East
More disturbing to me is why is it necessary to spread lies:
Yossi Levy, the Foreign Ministry's spokesman for the Hebrew press said earlier Friday, "It's hard to imagine what kind twisted (person) would want to steal this terrible symbol at the entrance to the death camp. The same shuddering combination, 'work sets you free;, which millions of Jews saw moments and hours before their death."
Rami Hochman, general director of the Ghetto Fighters' House Museum in northern Israel, referred to the incident as "a new record in the shocking campaign aimed at denying and degrading the Holocaust.
Rami should tell Yossi not spread lies which should be refuted and not called denial.