Robinson De La Cruz Hilario, a Puerto Rico resident facing charges over online threats of mass violence and the receipt of illegal content, admitted to federal investigators that he posted threatening messages directed at both Jewish and other communities, according to a criminal complaint unsealed in federal court on Tuesday.

The FBI announced Friday that De La Cruz had been arrested after an investigation allegedly revealed “repeated online threats of mass violence..”

According to court documents, the FBI’s San Juan Field Office received information in February indicating that De La Cruz was planning a “mass shooting event” and had circulated a “tactical” map of a location in the San Juan metropolitan area. Investigators also uncovered numerous public social media posts in which he praised Omar Mateen, the gunman who killed 49 people in the 2016 massacre at Pulse, a venue in Orlando, Florida, before being shot dead by police. During the attack, Mateen pledged allegiance to ISIS leader Abu Bakr al-Baghdadi.

The complaint further alleges that on June 8, De La Cruz shared photographs of patches, some linked to neo-Nazi organizations, along with messages calling for murder.

Federal authorities said De La Cruz also posted a selfie in which he was holding “a Glock handgun.” During questioning, he admitted that he operated the social media accounts and made hateful posts. He also acknowledged that some of the posts amounted to threats, but claimed that “he had no intention of carrying it out” and said he wanted the messages to frighten people.