Experts are optimistic Tut's tomb may conceal lost queen

Radar indicates a secret chamber could be hidden behind mausoleum

Chances are high that the tomb of ancient Egypt's boy-king Tutankhamen has passages to a hidden chamber, which could possibly be the last resting place of the lost Queen Nefertiti, experts said on Saturday.

There is huge international interest in Nefertiti, who died in the 14th century BC and is thought to be Tutankhamen's stepmother, and confirmation of her final resting place would be a remarkable Egyptian archaeological find.