VIENNA—Austria is balking at paying its share of Greece's financial bailout.

Finance Minister Josef Proell says that the December tranche of Austria's contribution -- 190 million euros ($258 million)-- will only be paid out if Greece can show that it has raised the amount of money it pledged to take in through taxes.

Proell told reporters Tuesday that at this stage that target does not appear to have been met. The Austria Press Agency quoted him as saying that he would "comment critically" on this issue at the upcoming EU finance ministers' meeting in Brussels.

If Austria balks, and other countries follow suit, the Greek bailout package could unravel.

Athens is receiving euro110 billion ($150 billion) in rescue loans from the International Monetary Fund and other eurozone countries.

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