By Val Brickates Kennedy
BOSTON (MarketWatch) -- An oil rig explosion in Watonga, Okla., about 80 miles northwest of Oklahoma City, has forced the evacuation of homes within a two-mile radius of the blast, the Associated Press reported Tuesday. The AP said that while the fire was still burning as of Tuesday morning, no injuries had been reported. The cause of the explosion, which occurred Monday night, is still unknown.
