The father of a 25-year-old man who was suspected of a car bombing attack outside a California fertility clinic said he felt "terrible" and was "heartbroken" by the incident.

Richard Bartkus told Noticias Telemundo that he had always known his son Guy Edward Bartkus to have "good intentions" and thought he was "brainwashed." He said the last time he met or talked to his son was more than a decade ago, and he said Guy moved to Twenty-Ten Palm after living with his mother.

"It's hard for me to believe it's him," Battercus said.

Authorities say they believe Guy Edward Bartkus exploded the explosiveness outside the 1199 North Indian Canyon Drive around 11:00 a.m. Saturday. He is driving the 2010 Silver Ford Fusion.

The street is home to several medical facilities, including the American Reproductive Center (ARC). The center said in a Facebook post that its lab, including all eggs and embryos, was not damaged in the explosion.

"We are conducting a comprehensive safety check and confirm that our operations and sensitive medical areas are not affected by the explosion," Arc said.

The suspect was killed in the explosion, and four others were released by the hospital after being injured.

The attack appears to be related to anti-Natalist ideology. Ideology refers to the belief that no one should have children.

Bartkus told the news station that he did not know his son and believed in such a thing.

He said: "I've never even heard him talk about something like this before. I haven't seen him in 12 years. The last time I met him, he was a good kid. He likes hiking, he likes hunting, he likes rock hunting, he likes his computer, he likes Xbox, he likes Xbox, he likes Xbox, kids stuff."

Bartkus became emotional, "He has a kind heart. His heart changed."

Investigators said they are studying social media posts allegedly posted by suspects, including recordings they said support for anti-family nationalist ideology. Sources previously told NBC News that they are also working on YouTube accounts, as well as online forum posts published earlier this month, where the person used an explosive device to consider committing suicide.

The suspect is dealing with depression and personal relationship issues, according to law enforcement officers close to the investigation. After the attack, tactical officials were seen in a residence in Twenty-Ten Palm Trees, which the FBI believes was an act of terrorism.

The explosion damaged several businesses. It "feels like an earthquake," a witness told NBC Palm Springs.

"Everything collapsed," another witness told the news station. "So we're not sure what happened, we don't know where it came from. We just turned around and we just saw a lot of black smoke."

A Coachella Valley couple, Simone and Sophie, said they are clients of the American Reproductive Center and use the clinic to help them get pregnant.

Sophie told NBC Palm Springs. “My embryo is there.”