WASHINGTON (AP) — New revelations that China used cyberattacks to access data from nearly 40 Pentagon weapons programs and almost 30 other defense technologies have increased pressure on U.S. leaders to take more strident action against Beijing to stem the persistent breaches.

The disclosure, which was included in a Defense Science Board report released earlier this year, but is only now being discussed publicly, comes as Defense Secretary Chuck Hagel heads to Southeast Asia, where he will discuss the escalating cyberthreat with counterparts from a number of area nations.