A man was charged Wednesday in connection with last month’s bombing outside a fertility clinic in Palm Springs, California, after being apprehended in Europe and flown to New York City, where he was he was arrested overnight, authorities said.

Daniel Park, 32, of Washington state is charged with providing and attempting to provide material support to a terrorist, U.S. Attorney Bilal Essayli announced during a news conference.

Park is accused of shipping approximately 180 pounds of ammonium nitrate — commonly used as a precursor to construct homemade explosives — to the bomber, who was identified by officials as 25-year-old Guy Bartkus. Bartkus died in the blast outside the American Reproductive Centers fertility clinic on May 17. Four other people were injured in the explosion.

Essayli said evidence shows Park and Bartkus shared extremist beliefs. 

According to the criminal complaint filed Wednesday, “Bartkus’s attack was motivated by his pro-mortalism, anti-natalism, and anti-pro-life ideology, which is the belief that individuals should not be born without their consent and that non-existence is best.”

Investigators said Park also paid for an additional 90 pounds of ammonium nitrate that was shipped to Bartkus in the days leading up to the bombing.

Park spent approximately two weeks visiting Bartkus’ residence in Twentynine Palms, California, in late January and early February and ran “experiments” in his garage, Essayli said.

FBI Assistant Director Akil Davis, in charge of the bureau’s Los Angeles field office, said Park was charged because of his contributions to the bomb.

“Park was in possession of an explosive recipe that was similar to the Oklahoma City bombing,” Davis told reporters, referring to the 1995 attack on the Alfred P. Murrah Federal Building in downtown Oklahoma City that killed 168 people. “We believe that Park had knowledge of how to create an ANFO bomb, ammonium-nitrate-fuel-oil bomb.”

Park flew to Warsaw, Poland, on May 21, a few days after the bombing, Davis said. Polish authorities detained Park at the request of U.S. officials on Friday. He was flown back to the U.S. and taken into custody by American authorities at New York’s John F. Kennedy International Airport overnight.

Park is scheduled to appear in federal court in Brooklyn, New York, Wednesday afternoon. He is expected to be prosecuted in Los Angeles.

Four Polish border guards were with Park when he was taken back to the U.S., and two members of the FBI flying squad were also on the flight, according to two senior U.S. officials with direct knowledge of the investigation. Park consented to speak with the FBI at JFK and was interviewed by them there.

Police in Palm Springs said the bomber backed his Ford Fusion into a parking spot outside the clinic before the powerful explosion left a crater on the morning of May 17. The explosion could be felt more than a mile away from the blast zone, the FBI said.

The vehicle exploded outside American Reproductive Centers, a fertility clinic with a full-service IVF lab that dd not perform abortions. The blast caused significant damage to the building. The facility also lost power, but it was restored in time so no embryos were lost in the attack. The clinic reopened about two weeks later at a new location.

The FBI believed that the bombing was premeditated and called the attack an “intentional act of terrorism.”

Detectives said they believed Bartkus acted alone at the site of the attack, but said they were scouring his online chats to learn whether anyone helped him buy parts or refine the design of the bomb.

Investigators said the blast pattern shows that the device was far more damaging than a low-grade explosive such as fireworks.

The FBI said Bartkus had access to a large quantity of commercially available chemical products that could be combined to create a homemade explosive device.

Twentynine Palms is home to a large Marine Corps base about an hour’s drive from Palm Springs.  

Anna Schecter

contributed to this report.