SEOUL, South Korea — The United States flew two supersonic bombers over the Korean Peninsula on Tuesday in a show of force against North Korea, South Korean officials said.

The U.S. often sends powerful warplanes in times of heightened animosities with North Korea, and flew B-1B bombers several times this year as the North conducted a series of banned ballistic missile tests.

Tuesday’s flights by B-1Bs came shortly after the death of a Hamilton County man who was recently released by North Korea in a coma following more than 17 months of captivity.

RELATED: Otto Warmbier's death baffles experts

Seoul’s Defense Ministry said the bombers engaged in routine exercises with South Korean fighter jets aimed at showing deterrence against North Korea.

The U.S. military said the bombers conducted two separate drills with the Japanese and South Korean air forces. It said the flights demonstrated solidarity among South Korea, Japan and the United States “to defend against provocative and destabilizing actions in the Pacific theater.”

RELATED: Coroner investigating Otto Warmbier's death

The United States stations tens of thousands of troops in South Korea and Japan.

The family of Otto Warmbier said the 22-year-old died Monday at University of Cincinnati Medical Center, days after his release from North Korea. Analysts say his death will likely cast a shadow on relations between the U.S. and North Korea and compound efforts by South Korea’s new liberal president to improve ties with the North.

RELATED: Trump 'condemns the brutality of the North Korean regime' after Warmbier's death