A Washington man charged with aiding the bomber of a fertility clinic in California has died after he was found unresponsive in federal custody.

Federal authorities say they have arrested a Washington man who provided chemicals to make explosives used to bomb a California fertility clinic in May.

Investigators are combing through the writings of a 25-year-old man believed responsible for an explosion that ripped through a Southern California fertility clinic over the weekend.

A 25-year-old man believed to be responsible for an explosion that ripped through a Palm Springs, California, fertility clinic left behind “anti-pro-life” writings before carrying out the attack.