ECB president Mario Draghi. REUTERS/Francois Lenoir Greek banks will not be getting any more help from the European Central Bank.

In an announcement on Monday afternoon, the ECB announced that it would keep its emergency Liqudity assistance, or ELA, to Greece unchanged at levels announced last Monday.

That level is believed to be around €89 billion.

The problem for Greek banks, as it stands, is that it looks like they are quickly running out of cash, and unless the ECB releases more money to them, the prospect of Greek banks re-opening on Thursday (at the earliest) for full use appears uncertain at best.

Headlines from Bloomberg on Monday indicated that Greece requested an additional 3 billion euros under the ELA but was denied by the ECB. Reuters reported that Greek prime minister Alexis Tsipras spoke with ECB head Mario Draghi on Monday and said there was an "immediate need" to lift capital controls in Greece.

Capital controls have now been in place for over a week in Greece, with ATM withdrawals limited to 60 euros.

Also of note is that the ECB said that it will adjust the haircuts on collateral accepted by the Bank of Greece as part of the ELA.

This means, basically, that if the ECB increases the haircuts on collateral accepted by the Bank of Greece, the size of the ELA effectively decreases. If the adjustment is the other way, the ELA is effectively increased in size.

The ECB was not totally clear on this measure, but according to Bloomberg, the ECB's haircut on Greek government debt and guarantees was raised to 45%.

According to The Financial Times, it appears that 2 members of the ECB's governing council objected to the decision, with those objectors wanting even stronger measures — read: larger haircuts — on Greek collateral.

In short, the ECB has just tightened the screws on Greece's banking system, which was already under significant duress as assets have steadily flowed out of the country.

Deposits have been steadily flowing out of Greek banks. Barclays

Also in the statement, the ECB said that it is "closely monitoring the situation in financial markets" and stands ready to use "all the instruments available within its mandate."

Here's the full text of the ECB's announcement:

Emergency liquidity assistance maintained at 26 June 2015 level

Haircuts on collateral for ELA adjusted

Governing Council closely monitoring situation in financial markets

The Governing Council of the European Central Bank decided today to maintain the provision of emergency liquidity assistance (ELA) to Greek banks at the level decided on 26 June 2015 after discussing a proposal from the Bank of Greece.

ELA can only be provided against sufficient collateral.

The financial situation of the Hellenic Republic has an impact on Greek banks since the collateral they use in ELA relies to a significant extent on government-linked assets.

In this context, the Governing Council decided today to adjust the haircuts on collateral accepted by the Bank of Greece for ELA.

The Governing Council is closely monitoring the situation in financial markets and the potential implications for the monetary policy stance and for the balance of risks to price stability in the euro area. The Governing Council is determined to use all the instruments available within its mandate.