TEHRAN According to some U.S. officials, Russia, China and Iran are trying to develop their military capabilities to join an attack against the U.S. cyber-infrastructure.

A U.S. intelligence officer told the U.S. House Economic Committee on Saturday that the cyber-warfare will be the new type of military operations in the future.

He said these operations have already been witnessed in counties like China and Russia, adding that other countries also have some active plans to develop their cyber-warfare.

This intelligence officer stopped short of going into detail on the grounds that such information was classified, but the U.S. intelligence sources believe that Russia, China, North Korea and Cuba have active plans to develop their cyber-warfare.

The United States has claimed that Iran, Iraq and India are also seeking expertise and know-how in this area.