WASHINGTON — American and Afghan warplanes conducted a series of strikes on Sunday night at what American officials said were Taliban drug depots, as part of what is expected to be a sustained campaign targeting the group’s $200 million-a-year opium trade.

Gen. John W. Nicholson Jr., the commander of the United States operations in Afghanistan, said that B-52 bombers and F-22 warplanes took part in the strikes, the first such attacks under new authorities granted by President Trump to officials conducting the war in Afghanistan.

“Heroin’s become a global issue,” General Nicholson told reporters on Monday during a teleconference news briefing from Afghanistan. “These criminals living in Afghanistan who are closely linked to the Taliban are responsible for 85 percent of the world’s opium.”

He said that the campaign against Taliban drug labs, which he said numbered about 400 to 500 across the country, would continue into the foreseeable future. The United States alone spends more than $8 billion to fight the drug trade.