Eamonn reported earlier that, despite the introduction of a ceasefire on Friday, artillery fire had been heard near Mariupol.
Now there are reports of fresh shelling around Donetsk airpoirt still held by Ukrainian govt forces.
A BBC reporter on the scene said ealier
We have heard a lot of mortars being fired, both into the airport area and outgoing as well. We also met an observer team from the Organization for Security and Co-operation in Europe (OSCE).
It said most of the firing was outgoing from the airport, ie from Ukrainian troops. It said the firing had caused some fires in villages nearby but stressed that, although a violation of the ceasefire, the fighting at Donetsk airport was not sufficient to actually make the ceasefire collapse
The BBC has more here.
Eastern Ukraine balance of power
