NEWARK - The U.S. government is warning airlines that some terrorists are considering surgically implanting explosives into humans to carry out attacks.

There is no intelligence pointing to a specific plot, but the U.S. has shared this information with executives at domestic and international carriers.

The Transportation Security Administration says that people traveling to the U.S. from overseas may experience additional screening at airports. The agency says measures may include "interaction with passengers, in addition to the use of other screening methods such as pat-downs and the use of enhanced tools and technologies."

Rafi Ron, of New Age Security Solutions, claims, "There's no way we can take the next step, after the body-scanners, to figure out when a person carries a device inside his body."

Placing explosives and explosive components inside humans is not a new idea. But a U.S. security official says there is new intelligence pointing to a fresh interest in using this tactic. The official spoke on condition of anonymity to discuss sensitive security information.

AP wire services contributed to this report.