An enraged Iranian immigrant used a 3-pound hammer to beat his wife, sister-in-law and mother-in-law to death and then stabbed them repeatedly because he felt "disrespected," police said Monday.

After the attack, Daryoush Ebrahimi, 55, also struck himself several times in the head with the same maul hammer he used to bludgeon his relatives, said Chicago Police Cmdr. Thomas Byrne.

"It was a very difficult scene, and that would be indicative of that type of anger," Byrne said of the two apartments where the bodies were found on the city's far North Side.

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Police also found cell phone video messages and a letter that Ebrahimi left at one of the apartments, Byrne said. The FBI is helping translate the messages and letter, which are in Farsi.

"Right now I wouldn't say it's a suicide note ... but it's more about, again, how he feels disrespected, and that's pretty much a reocurring theme in the note," Byrne said.

Ebrahimi has been charged with first-degree murder in the deaths of his wife, Karmin Koshabeh, 44; his sister-in-law, Karolin Khooshabeh, 40; and his 60-year-old mother-in-law, Ileshvah Eyvazimooshabad. He appeared in court Monday afternoon, where a judge denied his bond.

Detectives said the family may have had a history of violence.

"We're getting signs that there has been some violence in the past ... to what degree I don't know," Byrne said.

Koshabeh and Khooshabeh were found Saturday in an apartment in the city's West Rogers Park neighborhood, and Eyvazimooshabad was found in an apartment around the corner.

Detectives believe Ebrahimi killed his wife around 2 a.m. on Saturday, then called and "lured" his sister-in-law to the same apartment around 6 a.m., Byrne said. He then allegedly went to his mother-in-law's apartment and attacked her there, returning to his wife and sister-in-law's bodies to call 911, Byrne said.

Ebrahimi also called another family member, who notified police, Byrne said.

When police arrived, they found Ebrahimi hitting himself with the hammer, apparently trying to kill himself, Byrne said. He was treated and released Sunday from a nearby hospital.

Ebrahimi, his wife and daughter, arrived in the United States on Nov. 29 from Iran and are refugees of Assyrian descent, said Cmdr. David Sobczyk. Chicago's Assyrian community includes about 100,000 people, making it one of the largest in the country.