Tear gas and arrests at Hong Kong university - BBC News
The BBC's Robin Brant describes the volatile scene at Hong Kong's Polytechnic University.
A number of protesters have been arrested while trying to run from a Hong Kong university campus surrounded by police.

Groups of demonstrators have made several attempts to flee following a violent and fiery overnight stand-off at Polytechnic University.

The BBC's Robin Brant was at the university and described the scene as one group made its move.