wo teenage US soldiers have been arrested for having sex in front of tourists at the Alamo. The 19-year-old man and 18-year-old woman were naked from the waist down when tourists spotted them.

The couple are based with a medical batallion nearby to the historic Texas fort, reports WOAI news.

Several visitors reported seeing the soldiers and reported them to police who charged them with public lewdness.

"This is sacred ground," Alamo director David Stewart told WOAI. "It's kind of like doing it in a church."

The Alamo, in the heart of downtown San Antonio, is the most popular tourist attraction in Texas.

WOAI says it often attracts attention seekers because of its status as an American icon.