At least one person has been killed and two injured during an assault on Donetsk airport, local authorities have said.
There was no full account from either side of casualties. But the press service of the regional administration said one man had been killed and two injured from shrapnel of a shell which struck a part of the railway station serving the airport.
More top news
Authorities have warned that the death toll is likely to rise as much of the building is yet to be searched.
The PM will sound out the possibility of new free trade agreements with Gulf states for once the UK has left the EU.
In the unexpected announcement on Monday, Mr Key said it was the "right time" to leave politics.