Plea for release of US hikers arrested in Iran

The mothers of two US hikers arrested in Iran have been making an emotional plea for their release.

Cindy Hickey and Nora Shourd went to the Iranian embassy in London to again ask for their children to be set free.

Sarah Shourd, Shane Bauer and Josh Fattal are all accused of spying and being held in Tehran, without charge.

Colette McBeth reports on the mothers' latest attempts to secure their release.