Ukraine crisis: Fear of war strikes in Mariupol

The ceasefire in eastern Ukraine appears to be on the verge of collapse.

There have been more clashes between Ukrainian forces and pro-Russian rebels during the day.

Mortar fire was exchanged at Donetsk airport, while there was more shelling near the port city of Mariupol after a woman was killed during a rebel bombardment overnight.

Fergal Keane reports from Mariupol