Why did the BBC call hostages 'prisoners'?

Why did the BBC call hostages 'prisoners'?

The BBC was forced to issue a live on-air correction due to public outcry. "Earlier today on BBC News we reported on the names of those three Israeli hostages who are due to be freed tomorrow," the statement read. "At one point during the coverage we mistakenly called the hostages 'prisoners' and we would like to apologise."