Gold and gold receivables held by euro zone central banks fell by 1 million euros to 419.822 billion euros in the week ending Dec. 9, the European Central Bank said on Tuesday.

Net foreign exchange reserves in the Eurosystem of central banks rose by 40.3 billion euros to 236.7 billion euros due to transactions as well as its U.S. dollar liquidity operation, the ECB said in its regular weekly consolidated financial statement.

Gold holdings fell because of sale of gold coins by one euro zone central bank, the ECB said.

It added that the combined balance sheet of the ECB and the 17 national central banks in the euro zone rose by 25 billion euros to a new all-time high of 2.461 trillion euros.