As Greek Prime Minister Alexis Tsipras blasted Athens' creditors, reportedly spurning a last-minute debt offer, global markets teetered on fears the debt-laden country was edging toward default.
We'll keep you up to date with all the latest news in the live blog below.
Here's the latest Greece coverage from CNBC:
Greek crisis stokes bitcoin prices higher
7 things investors need to know about the Greek crisis
Greek referendum gamble by Tsipras unleashes chaos
Grexit is tragedy for Greece, but 'Apocalypse Not': Strategist
ECB forces Greek people to decide: Robert Hormats
Greece could face social unrest soon: Wilbur Ross
Capital controls: Greeks and tourists to be hit hard
Global markets slide on Greek crisis fears
Will a Greek tragedy be the euro's downfall?