For the second time in a week, a U.S. military plane has been intercepted by Chinese fighter jets in an "unprofessional" and "unsafe" manner, the Pentagon said Saturday.

The latest incident, which occurred over the disputed South China Sea, came Wednesday when two Chinese J-10 aircraft intercepted a U.S. Navy P-3 Orion surveillance plane operating in international airspace above the strategic waterway, Pentagon spokesman Cmdr. Gary Ross told The Japan Times.

"The aircrew deemed the intercept unsafe and unprofessional," Ross said, adding that operations were able to continue unimpeded afterward.