(CBS News) -- The commander of U.S. air forces in the Pacific has reported a significant increase in activities by Russian planes and ships in the region.
Gen. Herbert Carlisle linked the uptick in Russian traffic to the situation in Ukraine. He said Russia was demonstrating its capabilities and gathering intelligence on U.S. military exercises.
Carlisle said there had been long-range Russian air patrols to the coast of California and a circumnavigation of the U.S. Pacific territory of Guam. He said a U.S. F-15 fighter jet intercepted a Russian strategic bomber that had flown to Guam.