According to several media reports, the 18-year-old white man suspected of killing 10 people in a racially-motivated attack in Buffalo shared his plans with others in an online chat room.

The suspect uploaded photos, hand-drawn maps, and detailed messages of his preparations on a private Discord server only to him, according to The New York Times.

The Washington Post reported that the images included him posing with gear, such as a military-style helmet bought from eBay, body armor plates, and the semiautomatic weapon that police said he used in the shooting.

He wrote in his messages that he lied to the authorities about making a threatening comment in class. He shared a document by the man who killed 51 Muslims in New Zealand.

The suspect started writing on his Discord server that he had a new plan to attack Black people at the Tops grocery store in Buffalo, The Post reported.

He wrote that he was confronted by a security guard after scouting out the location.

The suspect started inviting others to join his server around 30 minutes before the attack, sending links to like-minded individuals on web forums, according to The Times.

A small group of people joined the server and were able to see the chat logs and uploaded photos, according to a Discord spokesman.

The records show no other people saw the diary chat log before that.

None of the people invited to the group tried to stop the attack, according to The Times.

According to The Post, the server has been removed.

The suspect live-streamed his attack on the platform. The stream was terminated within two minutes of the violence starting.