CHRIS KAHNNEW YORK (AP) â¿¿ A pledge from Saudi Arabia to pump more oil to cover supply shortages and new signs that China's economy is slowing helped sink oil prices Tuesday. Oil has risen more than 9 percent this year. The primary reason is a standoff over Iran's nuclear program that has threatened to disrupt oil supplies from the Middle East. Benchmark U.S. crude fell $2.48 to $105.61 per barrel in New York while Brent crude lost $1.59 to $124.12 in London. The Saudi government said it aims "to provide adequate supplies of petroleum, stabilize oil markets and return oil prices to fair levels for producers, consumers and the oil industry." Saudi Arabia produces about 10 million barrels a day and says it has the ability to quickly raise that to 12.5 million barrels a day. Iran exports more than 2 million barrels of oil each day. The European Union and the U.S. have imposed sanctions that make it tougher for Iran to sell its oil. In response, Iran has threatened to block oil shipments through the strategically important Strait of Hormuz, A fifth of world's oil supplies pass through the strait at the edge of the Gulf. The ruler of Kuwait was quoted Tuesday by the state news agency as saying that Iran has assured its neighbors that it won't block the vital waterway. He also said his country is increasing production. Those comments contributed to the decline in oil prices. The Saudis and Kuwaitis are trying to send a message that the market shouldn't be so concerned about Iran, independent analyst Jim Ritterbusch said. "If they can bring more barrels to refineries, then it could help oil prices" cool off. Concern about a slowdown in China's economy also pressured oil prices. Mining giant BHP Billiton forecast weakening Chinese demand for iron ore used in steelmaking. Also, China raised the price of retail gasoline for the second time in two months, which could hurt demand for fuel.