SAN JUAN, Texas (AP) — A U.S. Customs and Border Protection pilot and observer have been hospitalized for observation after their helicopter crashed near the Mexican border while supporting a border security mission in South Texas Tuesday.The crash occurred in a rural area surrounded by farm fields south of Alamo and San Juan. Border Patrol and Texas Department of Public Safety troopers restricted access to the site, but the white belly of the customs helicopter could be seen as it rested on its side in the distance.CBP spokeswoman Gina Gray says there were no serious injuries. The Federal Aviation Administration will investigate the crash. She says the crash occurred around noon Tuesday while an EC-120 helicopter was "flying in support of routine border security operations."