NEW YORK — An individual who penned an online manifesto claiming responsibility for an explosion in Chelsea that injured 29 people has determined not to be credible, multiple sources said Sunday.

The manifesto — "I'm the NY Bomber: This is will be my manifesto" — was discovered the day after Saturday night's attack.

A high-ranking official confirmed when it was first spotted that investigators were aware of the blog and were working to determine its validity.

Hours later, officials with the NYPD and mayor's office said the manifesto was determined not to be credible and was linked to a person in North Carolina.

"It washed out," a source said of the author's false claims.

The manifesto included two posts, "Taking a human life" and "Manufacturing Test Explosives."

You probably have all seen the news by now,

the explosives detonated in New York City, that was me. Those were just some tests, I know where I have made errors and I will not make the same mistake next time.

I did it because I cannot stand society.

I cannot live in a world where homosexuals like myself as well as the rest of the LGBTQ+ community are looked down upon by society.

Click here to read the manifesto in its entirety.

The alleged manifesto was pulled offline within 45 minutes of PIX11 publishing this story.

The explosion in Chelsea at West 23rd Street injured 29 people and caused "significant damage" to the area.

While the incident was "obviously an act of terrorism," no links to any international groups have been found, Gov. Andrew Cuomo said Sunday.

An investigation continued into the motive behind the attack. No arrests have been made.