DALLAS (AP) — The girlfriend of a man arrested in Dallas Tuesday in a shooting that wounded three women in a Koreatown hair salon told police he had been admitted to health facilities because he was having delusions about Asian Americans, according to an arrest warrant affidavit.

Jeremy Theron Smith, 37, faces three charges of aggravated assault with a deadly weapon, according to jail records.

The FBI said Tuesday that it has opened a federal hate crime investigation along with federal prosecutors in Texas and the U.S. Department of Justice’s civil rights division. Police chief Eddie Garcia is expected to release additional information about the arrest later Tuesday.

Smith, who is Black, is jailed and no bond has been set. Jail records do not list an attorney for him.

According to the affidavit obtained by The Dallas Morning News, Smith’s girlfriend told authorities that whenever Smith is around an Asian American, “he begins having delusions that the Asian mob is after him or attempting to harm him.”

The newspaper reported that she told detectives he had been having delusions about Asian Americans ever since being involved in a car crash about two years ago with a man of Asian descent. She said he was also fired for “verbally attacking” his boss, who was of Asian descent.

Garcia has said the shooting last Wednesday at Hair World Salon could be connected to two previous shootings at businesses run by Asian Americans.

Dallas FBI spokeswoman Melinda Urbina said agents are working with Dallas Police “to thoroughly investigate this incident” but that she couldn’t provide further information because the probe is ongoing.

The shooting in Dallas occurred a few days before a white gunman killed 10 Black people Saturday at a supermarket in Buffalo, New York, and a gunman who authorities said was motivated by political hatred for Taiwan killed one person and wounded five Sunday at a southern California church where mostly elderly Taiwanese parishioners had gathered.

Authorities in Dallas have said a man dressed all in black opened fire at the salon, then drove off from the shopping center in a maroon minivan. Garcia said investigators found that a similar vehicle had been reported as involved in two other recent shootings. Someone opened fire in an April 2 drive-by near the salon and Garcia said the minivan was also linked to a May 10 shooting about 25 miles southeast of there. No one was injured in either of those shootings.

The three women who were shot at the salon Wednesday were taken to a hospital with injuries that weren’t life-threatening.

Jane Bae, the daughter of one of the wounded women, told The Associated Press last week that her mother said she didn’t recognize the gunman who calmly walked into the salon, opened fire, then left.

“He was calm. He just walked up to it and then stood there — didn’t walk around — but stood there and shot like 20 shots and then just calmly went out,” said Bae, who wasn’t there but had spoken with her mother.

The salon is in the heart of Koreatown, which is in a part of the city that was transformed in the 1980s from an industrial area to a thriving district with shopping, dining, markets, medical offices and salons.

Anti-Asian violence has risen sharply in recent years. Last year, six women of Asian descent were among the eight killed in a shooting at massage businesses in and near Atlanta, heightening anger and fear among Asian Americans.

Associated Press writer Jill Bleed in Little Rock, Arkansas, contributed to this report.