The U.S. Justice Department filed charges on Tuesday against a resident of California for trying to provide “material support” to the Islamic State of Iraq and al-Sham (ISIS). The suspect has also been accused of plotting terrorist attacks on behalf of the foreign terrorist organization.

In a Tuesday press release, the Justice Department announced that Ammaad Akhtar, a 33-year-old resident from Stockton, California, was arrested and charged for “attempting to provide material support to a foreign terrorist organization.”

The Justice Department pointed to court documents that show the 33-year-old suspect has been communicating online since February with a “law enforcement-controlled individual, whom Akhtar believed was a member of ISIS.” The Justice Department explained that Akhtar expressed his support for ISIS and jihad in his conversations with the undercover individual and vocalized his “desire to travel overseas to join and fight with ISIS” and to “send guns and money to ISIS.”

According to Tuesday’s press release, Akhtar demonstrated his intention to provide material support for ISIS in April by “providing financial funding on multiple occasions.” The Justice Department said that after providing multiple payments, the law enforcement-controlled individual informed the 33-year-old suspect that ISIS had obtained multiple guns with the money he had provided. In response, Akhtar said, “May Allah destroy our enemies.” Akhtar also indicated that he would provide additional funding for ISIS.

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“Akhtar also talked about planning acts of violence, including conducting an attack against a specific individual and an attack utilizing homemade explosives,” the Justice Department stated. “He said he ‘want[s] to die in the cause of Allah fighting the kuffar [infidels]’ and asked for instructions on how to make a homemade explosive device in order ‘to make a boom’ at a populated event.”

The Justice Department explained that Akhtar met on Monday with an “undercover employee” whom he thought was an ISIS associate and provided the undercover individual with $400 in cash, two loaded firearms, six additional magazines, binoculars, and clothing. The Justice Department also noted that Akhtar swore loyalty to ISIS on Monday.

According to the Justice Department, Akhtar could face up to 20 years in prison and a $250,000 fine if he is convicted of his charges. The Justice Department added that Akhtar’s case is under investigation by the Federal Bureau of Investigation’s Sacramento Field Office with assistance from the agency’s New York Field Office and the New York City Police Department.