Frankfurt - Major central banks have intervened in foreign exchange markets to improved liquidity, a statement early Thursday from the European Central Bank (ECB) in Frankfurt said.

It said the concerted move aimed to ease strains in worldwide exchange of dollars. Together with other moves by individual central banks in recent days, it would improve liquidity on world financial markets.

The participating banks were the ECB, the Bank of Canada, the Bank of England, the US Federal Reserve, the Bank of Japan and the Swiss National Bank.

The ECB said it would inject more dollars into the market by way of a rapid one-day tender with a volume of 40 billion dollars. (dpa)