The US company CyberBlue said on Monday that the company will end its services to the Internet message board "Shan 8" (8 chan) after a terrorist used a messaging forum before killing 20 people in a store and the Mart in El Paso, Texas on Saturday.
The shooter is believed to publish a four-page statement at the site of "Shan 8", describing the attack as "a response to the Spanish invasion of Texas."
The suspect was officially identified as a white man named Patrick Crosius, aged 21, from Allen, Texas, a suburb of Dallas, 1.046 miles east of El Paso.
The suspect on his page at Shan8 expressed his support for the terrorist who killed 51 people at two mosques in Christchurch, New Zealand, in March.
"We just sent a notice that we are ending our link to Shan 8 as an active customer in the middle of the night Pacific time," said Claude Prins, chief executive of Matthews in a blog.
"Based on the evidence we have seen, the gunman appeared to have posted material on the site immediately before his startling attack on El Paso Walmart and killed 20 people," Prince said.
Although the Shan 8 did not violate the law by not supervising its hateful content published by its users, it "created an environment that revealed a violation of its spirit," the CEO's blog said.