The FBI is evaluating a claim of responsibility for the New York City bombing on the social blogging service Tumblr.

A law enforcement official told The Associated Press on Sunday that the FBI is aware of the posting and was working to determine its authenticity. The official wasn’t authorized to discuss an ongoing investigation by name and spoke to The Associated Press on condition of anonymity.

“This is not the end, this is just the beginning,” wrote someone who claimed to be the New York City bomber .

“You probably have all seen the news by now,” the person wrote on a Tumblr blog called “I’m the NY Bomber,” subtitled “This is will be my manifesto.”

“The explosives detonated in New York City, that was me,” the blog post says of the Chelsea bombing at 23rd Street off Seventh Avenue that injured 29 people. Another device was found nearby.

“Those were just some tests,” the blogger writes. “I know where I have made errors and I will not make the same mistake next time.”

Authorities hadn’t confirmed as of mid-Sunday afternoon whether or not they believe it was genuine. They also revealed that a 911 call came in after the 8:30 p.m. blast Saturday claiming “there will be more.”

“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.

“It is 2016 and we are still being viewed as mentally ill, sinners, attention seekers, and just plain weirdos in general.

“I am not going to stand by while under classed and underprivileged people are oppressed. I am not going to stand by while there is inequality in my country such as the racism being seen in white police officers all over the country. I am not going to live in a country where it is OK to have a misogynist, xenophobic, racist Islamophobic, republican candidate running for President of The United States!

“That’s implying that republicans in general should even be taken seriously as they are all cisgendered[ sic ] privileged white people.”

In the blog’s first post, the writer says:

“I don’t know exactly how I feel about taking human lives. However, what I do know is that If I don’t do what needs to be done nobody will pay attention.

“LGBTQ+ people are much more likely to commit suicide than straight cisgendered people.

“It seems that nobody cares,” the writer adds. “]H]owever what if people from the LGBTQ+ community started lashing out in response to the violence and oppression we face with violence and possibly oppression?

“I’m sure that would give people a reason to not stand by while so many people are being oppressed.

“I suppose I’m just going to have to move forward knowing that what I am doing had a purpose and will in fact make a difference. I’ll keep you all posted.”

(YWN Desk – NYC / AP)