Shares of US drillers hit by deadly Colorado blasts

New York

TWO months after a Colorado home exploded near an Anadarko Petroleum Corp well, the reverberations are still rattling the US oil industry, driving down driller shares and raising fears of a regulatory backlash.

The April 17 blast, which killed two people and injured a third, was followed a month later by a second deadly explosion at an Anadarko oil tank in the state.

The incidents have revived calls to restrict drilling near populated areas within Colorado's rich Niobrara shale formation, the fourth-most productive s…