Tens of thousands of Greeks have attended rival rallies in Athens ahead of a crucial referendum on Sunday.

Tens of thousands of Greeks have attended rival rallies in Athens ahead of a crucial referendum on Sunday.

Prime Minister Alexis Tsipras was greeted with huge cheers when he told supporters to vote "No" to the terms of an international bailout.

But those attending another huge rally nearby warned a "No" vote would see Greece ejected from the eurozone.

A Greek court earlier rejected a challenge to the legality of the referendum and it will go ahead.

Greece's current bailout programme ran out on Tuesday. All week banks have been shut, with limits imposed on cash withdrawals.