SEOUL, South Korea—North Korea launched seven ballistic missiles Saturday into waters off its east coast in a show of military firepower that defied U.N. resolutions and drew global expressions of condemnation and concern.

The salvo, confirmed by the South Korean government, also appeared to be a slap at the United States as Washington moves to enforce U.N. as well as its own sanctions against the isolated regime for its May 25 nuclear test.

The launches came on July 4, which is U.S. Independence Day. The display was similar to one that took place three years ago, also while Americans celebrated the Fourth of July during another period of tensions over Pyongyang’s nuclear weapons program.

The number of missiles was the same, though in 2006 North Korea also launched a long-range rocket that broke apart and fell into the ocean less than a minute after liftoff.

South Korea said Saturday’s missiles likely flew more than 250 miles, apparently landing in waters between the Korean peninsula and Japan.