A 21-year-old Ohio man accused of planning to attack a Toledo synagogue told undercover FBI agents that he was inspired both by Islamist propaganda and the suspect in the Pittsburgh synagogue massacre that killed 11 people, authorities said Monday.

The murderous plot is the second to be thwarted in Ohio, according to federal prosecutors, who on Monday detailed a separate, unrelated large-scale scheme in which a 23-year-old woman was charged with stockpiling bomb materials and planning a mass killing at a Toledo bar.

The suspect in the alleged Toledo synagogue plot told an undercover FBI agent that he appreciated the Pittsburgh assault, according to federal documents.

“I admire what the guy did with the shooting actually,” Damon M. Joseph wrote to the agent on Oct. 30, three days after the Pittsburgh attack, according to the affidavit, filed in the U.S. District Court for the Northern District of Ohio.

He added: “I can see myself carrying out this type of operation inshallah," he said, using the Arabic word for "God willing."

A gunman shot and killed 11 people at the Tree of Life synagogue in Pittsburgh in October. Robert Bowers, a 46-year-old Pittsburgh man with social media ties to the white nationalist movement, has been charged with 44 counts of murder, firearms offenses and hate crimes in that incident.

Joseph, of Holland, Ohio, was charged Monday with one count of attempting to provide material support to ISIS. Police arrested him Friday after he took possession of two semi-automatic rifles to carry out the attack, authorities said.

Agents said Joseph, who also used the name "Abdullah Ali Yusuf," drew their attention earlier this year by posting his support of Islamic terrorists on social media accounts – including images that originated from ISIS propaganda.

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Undercover FBI agents made contact with him, they said, and outlined their communication in an affidavit filed in court Monday.

In September, they said, Joseph made an ISIS recruiting video and sent it to the agents. He complained that the mosque he attended was critical of ISIS.

He also gave the agents a shopping list that included AR-15 and AK 47 rifles and ammunition, they said.

Joseph continued to plan the attack, they said, and told the agents last week that he was deciding between two synagogues, depending on “which one will have the most people, what time and what day."

"Go big or go home," he told the agents, they wrote in the affidavit.

The undercover agents met with Joseph, gave him a duffel bag with two inoperable rifles and arrested him.

U.S. Attorney Justin Herdman described Joseph as "a calculated man fueled by an ideology of hatred and intent on killing innocent people."

In the Toledo case, which authorities say was unrelated to Joseph's alleged plot, authorities arrested Elizabeth Lecron, 23, of Toledo, Monday after they said she bought bomb-making materials as part of a terrorist attack. She was charged with transporting explosives and explosive material with the purpose of harming others.

Lecron had been talking about carrying out several different types of violent attacks, including telling undercover agents in August that she and an associate had come up with a plan to commit a mass killing at a Toledo bar, officials said.

She also discussed attacking a livestock farm, her workplace and bombing a pipeline, federal prosecutors said.

“This defendant bought black powder and hundreds of screws that she expected would be used to make a bomb,” said Justin E. Herdman, United States Attorney for the Northern District of Ohio. “Through her words and actions, she demonstrated that she was committed to seeing death and destruction in order to advance hate. This case demonstrates terrorism comes in many guises."

Lecron came to the attention of law enforcement earlier this year after one of her associates expressed a desire to conduct a violent attack, prosecutors said. Lecron frequently posted photographs and comments on social media glorifying mass murderers, prosecutors said, including the Columbine shooters and Dylann Roof, an American white supremacist and mass murderer convicted for perpetrating the Charleston, South Carolina, church shooting on June 17, 2015.

More:Anti-Semitic pamphlets found in Pittsburgh synagogue shooting neighborhood

Joseph is at least the second suspect accused of taking inspiration from the Pittsburgh attack.

Jeffrey R. Clark Jr., 30, was arrested in Washington, D.C., last month and charged with illegal possession of a firearm. Authorities said relatives became concerned by his support for Bowers.

In one social media post, they said, Clark called the Pittsburgh attack "a dry run of things to come."

Clark and his 23-year-old brother, Edward, followed Bowers on the social media site Gab, which has become a haven for white supremacists who have been banned from more mainstream social media networks.

Edward Clark shot himself to death in a national park Washington hours after the Pittsburgh shooting, authorities said.