| The cause of the 
				crash of the AH-64 Apache helicopter, some 25 miles (40 km) 
				southeast of Houston, was not known.
 The two men who were killed were pilots from a helicopter 
				battalion at Ellington Field in Houston, a CBS affiliate 
				reported.
 
 The names of those killed have not been released.
 
 The crash did not affect navigation in the Houston Ship Channel, 
				which links the busiest U.S. petrochemical port to the Gulf of 
				Mexico, the Houston Pilots Association said.
 
 (Reporting by Jon Herskovitz in Austin, Erwin Seba and Liz 
				Hampton in Houston; Editing by Matthew Lewis and Sandra Maler)
 
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