North Korea on Saturday accused the US of carrying out aerial exercises to practice strikes on targets in the country. The North's Korean Central News Agency said the exercises were conducted over South Korea, but were meant as practice runs for possible aerial attacks against North Korea. "Strategic bombers of the US imperialist aggression forces staged a DPRK-targeted madcap air strike exercise" on Friday, KCNA reported, citing an unidentified military source, and using the acronym of the North's official name, the Democratic Peoples' Republic of Korea. The report didn't specify which targets the U.S. planes were pretending to attack, but said they were "major." North Korea routinely accuses the U.S. of aerial espionage, issuing a tally of such flights at the end of every month, and occasionally of conducting military drills targeting it. The US military doesn't comment, although it acknowledges monitoring North Korean military activity.