Federal authorities announced Wednesday the arrest of a Washington state man they say provided chemicals to make explosives used to bomb a California fertility clinic in May.

Federal authorities arrested a man they say collaborated with the bomber of a fertility clinic in May, alleging he supplied chemicals used to make explosives and traveled to California to experiment with them in the bomber’s garage months before the attack.

A Washington state man has been arrested in connection with the Palm Springs fertility clinic bombing, according to media reports. NBC Los Angeles reported early Wednesday morning that a man had been arrested at JFK Airport in New York City overnight in connection with the bombing.