Over the last decade Eyal Weizman and his colleagues within the London-based investigative group Forensic Architecture have examined violent occurrences around the world, often using video and architectural rendering software in efforts to parse confusing and often murky political and corporate events.

Last week Mr. Weizman confronted an unexpected mystery when he was informed by email that his right to travel to the United States under a visa waiver program had been revoked. The next day, on Feb. 14, he went to the U.S. Embassy in London to apply for a visa, but, he said, an official told him, without elaboration that an algorithm had identified a security threat that was related to him.

Mr. Weizman, who holds British and Israeli passports, had hoped to attend the opening of an art exhibition Wednesday night at Miami Dade College’s Museum of Art and Design. Called “True to Scale,” it is a survey of Forensic Architecture’s work. Mr. Weizman said by email on Wednesday that he has visited the United States dozens of times, most recently in December 2019.

He said that the embassy official had told him that the threat that surfaced could be related to something he was involved in, people he had been in contact with, places he had visited, hotels at which he had stayed, or a pattern of relations among those.