LONDON, Jul 12 (Reuters) - U.S. crude futures extended losses on Tuesday to fall over a dollar as pledges to contain the spread of the euro zone's debt crisis failed to dispel investor unease about the region's problems, allowing fears about slowing energy demand growth to weigh.
Ministers from the 17 countries that share the European currency on Monday vowed to safeguard stability in the euro area and promised new measures "shortly", but set no deadline after another day of turmoil across financial markets.
By 0707 GMT, U.S. crude