Ai Weiwei seeds sell for $782,000 in New York

Porcelain sunflower seeds created by the artist Ai Weiwei have been sold at Sotheby's in New York.

A tonne of the seeds sold for over $782,000 (£480,000) - a record for work by the Chinese dissident artist.

The seeds were originally displayed at the Tate in London before the exhibition had to be shut down when dust from the tiny pebbles raised concerns for the health of visitors.

Zoe Conway reports.