Woman held for Moscow child 'beheading'

Police in the Russian capital Moscow have arrested a woman on suspicion of murdering a child after she was found apparently carrying a severed head. 

The woman, believed to be the victim's nanny, is suspected of killing the child before setting fire to its parents' apartment.

CCTV appears to show the woman, dressed in a hijab, walking near a metro station with a head in her hands. A police officer intercepts and wrestles her to the ground.