NEW YORK >> A foiled plot to assassinate a prominent Sikh separatist leader in New York, just days after another activist’s killing, was meant to precede a string of other politically motivated murders in the United States and Canada, according to U.S. prosecutors.

In electronic communications and audio and video calls secretly recorded or obtained by U.S. law enforcement, organizers of the plot talked last spring about plans to kill someone in California and at least three other people in Canada, in addition to the victim in New York, according to an indictment unsealed Wednesday.

The goal was to kill at least four people in the two countries by June 29, and then more after that, prosecutors contend.

After Hardeep Singh Nijjar, a Sikh activist who had been exiled from India, was shot and killed outside a cultural center in Surrey, British Columbia, on June 18, one of the men charged with orchestrating the planned assassinations told a person he had hired as a hitman that he should act urgently to kill another activist, Gurpatwant Singh Pannun.

“We have so many targets,” Nikhil Gupta said in a recorded audio call, according to the indictment. “We have so many targets. But the good news is this, the good news is this: Now no need to wait.”

He urged the hitman to act quickly because Pannun, a U.S. citizen living in New York, would likely be more cautious after Nijjar’s slaying.

“We got the go-ahead to go anytime, even today, tomorrow — as early as possible,” he told a go-between as he instructed the hitman to kill Pannun even if there were other people with him. “Put everyone down,” he said, according to the indictment.

The attack plans were foiled, prosecutors said, because the hitman was actually an undercover U.S. agent.

The U.S. attorney in Manhattan announced charges Wednesday against Gupta, and said in court papers that the plot to kill Pannun was directed by an official in the Indian government. That government official was not charged in the indictment or identified by name, but the court filing described him as a “senior field officer” with responsibilities in security management and intelligence.

Indian officials have denied any complicity in Nijjar’s slaying. External Affairs Ministry spokesperson Arindam Bagchi said Wednesday that the Indian government had set up a high-level inquiry after U.S. authorities raised concerns about the plot to kill Pannun.

Court filings revealed that even before Nijjar’s killing in Canada, U.S. law enforcement officials had become aware of a plot against activists who were advocating for the secession from India of the northern Punjab state, where Sikhs are a majority.

U.S. officials said they began investigating when Gupta, in his search for a hitman, contacted a narcotics trafficker who turned out to be a Drug Enforcement Administration informant.

Over the ensuing weeks, the pair communicated by phone, video and text messages, eventually looping in their hired assassin — the undercover agent.

The Indian government official told Gupta that he had a target in New York and a target in California, the indictment said. They ultimately settled on a $100,000 price and by June 3, Gupta was urging his criminal contact in America to “finish him brother, finish him, don’t take too much time …. push these guys, push these guys … finish the job.”

During a June 9 call, Gupta told the narcotics trafficker that the murder of Pannun would change the hitman’s life because “we will give more bigger job more, more job every month, every month 2-3 job,” according to the indictment.

It was unclear from the indictment whether U.S. authorities had learned anything about the specific plan to kill Nijjar before his ambush on June 18.

The indictment portrayed Gupta as boasting that he and his associates in India were behind both the Canadian and New York assassination plots. He allegedly told the Drug Enforcement Administration informant on June 12 that there was a “big target” in Canada and on June 16 told him: “We are doing their job, brother. We are doing their New York (and) Canada (job),” referring to individuals directing the plots from India.

After Nijjar was killed, Gupta told the informant that Nijjar was the target he had mentioned as the potential Canadian “job” and added: “We didn’t give to (the undercover agent) this job, so some other guy did this job … in Canada.”

On June 30, Gupta was arrested in the Czech Republic at the request of the United States after arriving there on a trip from India. Federal authorities have not said when he might be brought to the United States to face murder-for-hire and conspiracy charges. It was unclear who would provide legal representation if he arrives in the U.S.

Pannun told The Associated Press in an interview Wednesday that he will continue his work.

“They will kill me. But I don’t fear the death,” he said.

He mocked India’s claim that it is conducting its own investigation into the assassination plots.

“The only thing, I think, (the) Indian government is going to investigate (is) why their hitman could not kill one person. That’s what they will be investigating,” he said.

Pannun said he rejects the Indian government’s decision to label him a terrorist.

“We are the one who are fighting India’s violence with the words. We are the one who are fighting India’s bullets with the ballot,” he said. “They are giving money, hundreds of thousands, to kill me. Let the world decide who is terrorist and who is not a terrorist.”

Some international affairs experts told the AP that it was unlikely the incidents would seriously damage the relationship between the U.S. and India.

“In most cases, if Washington accuses a foreign government of staging an assassination on its soil, U.S. relations with that government would plunge into deep crisis,” said Michael Kugelman, director of the Wilson Centre’s South Asia institute. “But the relationship with India is a special case. Trust and goodwill are baked into the relationship, thanks to rapidly expanding cooperation and increasingly convergent interests.”

Derek Grossman, Indo-Pacific analyst at the Rand Corp., said the Biden administration has demonstrated that it is prioritizing the need to leverage India as part of its strategy to counter Chinese power.

“I think publicizing the details of the thwarted plot will have very little, if any, impact on the deepening U.S.-India strategic partnership,” he said.

Associated Press writers Krutika Pathi in New Delhi and Ted Shaffrey in New York contributed to this report.