United States based oil and natural gas producer Anadarko Petroleum Corp. on Friday agreed to acquire its two competitors Kerr-McGee Corp. and Western Gas Resources Inc. for $21 billion.

In a bid to boost its North American output, Anadarko Petroleum Corp. on Friday agreed to pay about $21 billion to acquire two smaller competitors, Kerr-McGee Corp. and Western Gas Resources Inc.. Amidst soaring demand for natural gas, the acquisitions will give the company a stronger foothold...

Reuters - Oil and gas producer Anadarko Petroleum Corp. said on Friday it agreed to acquire Kerr-McGee Corp. and Western Gas Resources Inc. in separate cash deals totaling $21.1 billion to expand in the fast-growing Gulf of Mexico and the Rocky Mountains regions.

Anadarko Petroleum Corp. said Friday it is buying two rival energy companies for about $21 billion.

AP - Oil and natural gas company Kerr-McGee Corp. agreed to a $16 billion takeover by Houston-based Anadarko Petroleum Corp., another big natural gas producer, the companies announced Friday.