SAN FRANCISCO — A federal grand jury in California indicted a legendary Hmong resistance leader and 10 other men yesterday on charges that they conspired to obtain weapons and mercenaries to overthrow the communist regime in Laos.

Prosecutors also released what they said were blueprints for the coup, including one “top-secret” plan dubbed, “Political Opposition Party’s Coup Operation to Rescue the Nation,” or Popcorn.

The plan predicted that 75% or 80% of Laos’s population would support an overthrow of the government.

However, the papers indicate the coup was unlikely to be bloodless. “Those who will not be able to neutralize, will be in-house arrests or assassination,” one document reads in broken English. It is suggested that at least five sharpshooters target each senior Lao official.

The plans also discuss assigning Special Forces personnel to take over radio and television stations, newspapers, hospitals, airports, and other transportation hubs. The documents indicate plans to establish a transitional government and to hold democratic elections two years after the coup.

A budget for the takeover, which lists costs for automatic weapons, special forces, foot soldiers, food, and uniforms, projected total expenses of $27.9 million for the operation and the first 90 days after the coup. It is unclear who was to provide the funds.

The planning documents also indicate the humanitarian motivations behind the operation. An intelligence report from inside Laos talks of discovering “military mop-up plans to exterminate the Hmong-in-hiding (Freedom Fighters) completely.” Groups such as Amnesty International have accused the Lao government of widespread human-rights violations against Hmong and other groups who take refuge in Laos’s mountainous areas.

The 11 defendants, who face sentences in excess of life in prison if convicted, include a Hmong leader, General Vang Pao, 77, and a West Point graduate who served as an Army Ranger in the Vietnam War, Harrison Jack, 60. All of those charged are in federal custody and have been denied bail. Arraignments on the new indictment are scheduled for Monday in Sacramento.

Federal prosecutors have pressed forward with the case despite an outcry from the Hmong community, which took root in America after fleeing Laos in the wake of the Vietnam conflict. During that era, Hmong forces fought alongside CIA operatives as part of a secret army intended to put pressure on the communists in Laos, as well as their close allies in Vietnam.

“This is rotten,” a defense attorney involved in the case, Mark Reichel, said yesterday. He said prosecutors had endangered Hmong communities in Thailand and Laos by publicly releasing details of the alleged plot.

“People actually die when they fool around like this,” Mr. Reichel said. “It seems that a bunch of young men were waiting for weapons to come from America. … They’ve provided all the documentation to the Lao government. That’s a fine thing to do,” he said sarcastically.

The defense attorney said his client and other defendants, many of whom claim to have ties to the CIA, are likely to assert that they thought the operation had the blessing of the American government.

But the person they thought they were buying weapons from was an undercover agent of the Bureau of Alcohol, Tobacco, and Firearms.

“Who’s the last people who gave these guys arms? The CIA,” Mr. Reichel said. He said the agent’s representations that he was a Navy Seal with access to military weapons may have underscored that assumption.

“These are not criminals,” another defense lawyer, William Portanova, said. “Whatever happened was for a higher purpose, and under these facts, it is very, very difficult to imagine a small group would think they could do something like this alone.”

A spokeswoman for the prosecutors could not be contacted after business hours yesterday.

In the 1970s, two Cuban Americans with ties to the CIA used the so-called apparent public authority defense to reverse convictions stemming from the Watergate break-in. A federal appeals court ruled that the men, Eugenio Martinez and Bernard Barker, had the right to argue that they thought the Watergate mission was an authorized part of their duties.

A lawyer for the pair, Daniel Schultz, said yesterday that the Hmong might be able to make similar arguments. “I see the analogy, and I think it’s comparable,” he said. “I think it remains a valid defense.”

Mr. Schultz said the argument tends to be more effective on the behalf of lower-level operatives than on behalf of plot leaders, who could be expected to know what was and was not authorized by the government. “It’s a view-from-the-bottom-up defense,” the lawyer said.

Mr. Schultz said the Laos coup case is likely to become caught up in protracted rounds of litigation as defense lawyers attempt to pry out details of their clients’ connections with the CIA. “You’re going to have levels of resistance to disclosing,” he said. “It gets zoo-y.”