Audience members give a standing ovation as Acting Attorney General Todd Blanche, center, speaks at an event in Miami, May 20, where federal prosecutors announced charges against former Cuban President Raul Castro in the 1996 downing of civilian planes operated by Miami-based exiles. AP-Yonhap

MIAMI — Federal prosecutors on Wednesday announced charges against former Cuban President Raúl Castro in the 1996 downing of civilian planes operated by Miami-based exiles as the Trump administration escalated pressure on the socialist government.

The indictment was related to Castro’s alleged role in the shootdown of two small planes operated by the exile group Brothers to the Rescue. Castro, now 94, was Cuba's defense minister at the time. The charges included murder and destruction of an airplane.

Acting Attorney General Todd Blanche and other top Justice Department officials made the announcement in Miami at a ceremony to honor those killed in the shootdown.

“For nearly 30 years, the families of four murdered Americans have waited for justice,” Blanche said. “They were unarmed civilians and were flying humanitarian missions for the rescue and protection of people fleeing oppression across the Florida straits.”