"This evening at exactly midnight central European time the programme expires. And I am not aware of any real indications of anything else," said Merkel at a news conference with Kosovo's Prime Minister.

"Beyond this, it is clear that we will not close the channels of communication after midnight tonight ... that means the door remains open to talks but I cannot say any more than this," she added.

Asked whether she was aware of a last-minute offer to Greece from European Commission President Jean-Claude Juncker, Merkel responded, "All I know is that the last offer from the Commission that I'm aware of is from Friday of last week."

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