U.S. senators are calling for President Joe Biden’s administration to declassify materials on the origins of COVID-19.

Sen. Rand Paul (R-Ky.) said on Twitter that documents described in a Wall Street Journal report “should be declassified.”

“President Biden needs to declassify everything we know today,” Sen. Mike Braun (R-Ind.) added.

According to the report, the U.S. Energy Department is assessing that the pandemic likely started from a Wuhan laboratory leak.

The assessment was described in a document authored by the office of Director of National Intelligence Avril Haines, a Biden appointee, the Journal reported.

The department, the White House, and the office did not respond to requests for comment.

The department told news outlets in a statement that it ““continues to support the thorough, careful, and objective work of our intelligence professionals in investigating the origins of COVID-19, as the President directed.”

Biden in 2021 said he’d asked the intelligence community “to redouble their efforts to collect and analyze information that could bring us closer to a definitive conclusion” on the origins of COVID-19.

In an assessment (pdf) declassified later that year, the intelligence community, which Haines oversees, was split as to the origins of COVID-19.

Four intelligence community elements assessed with low confidence that COVID-19 came from animals, while one element believed the pandemic likely started with “a laboratory-associated incident” at the Wuhan Institute of Virology, according to the declassified report.

Three other elements “remain unable to coalesce around either explanation,” the report stated. “All agencies assess that two hypotheses are plausible: natural exposure to an infected animal and a laboratory-associated incident.”

The individual elements were not identified.

Intelligence community entities include the FBI, the Energy Department, and the CIA.

The State Department has assessed, in a document (pdf) made public in 2022, that a lab leak was the most likely origin for COVID-19.

Sen. Josh Hawley (R-Mo.) on Sunday said he would introduce legislation that would make all U.S. intelligence reports on COVID-19 “open to the people.”

The first COVID-19 cases were detected in Wuhan, a Chinese city, in late 2019. The United States has funded experiments at the Wuhan lab there.

No animal host for the virus that causes COVID-19 has been identified to date. Chinese officials have repeatedly rebuffed attempts to probe the origins of the pandemic and have made various unsubstantiated claims, including that the illness stemmed from U.S. experiments.

The new reporting, top Republicans said, bolster the position that the virus originated in the lab.

“This report affirms our belief that the substantial circumstantial evidence favors COVID-19 emerging from a research-related incident,” Rep. Cathy Rodgers (R-Wash.), who chairs the House Energy and Commerce Committee, and Reps. Morgan Griffith (R-Va.) and Brett Guthrie (R-Ky.), members of the panel, said in a joint statement.

“These revelations also further strengthen the need to uncover why high-ranking government officials, with help from Big Tech and the media, sought early on to silence any debate into a plausible theory of a lab incident while the Chinese Communist Party stonewalled investigations by the global scientific community,” they added.

Dr. Anthony Fauci and other top government officials worked to suppress talk of a possible lab leak.

Asked about the new report, national security adviser Jake Sullivan said on CNN on Sunday that “there is a variety of views in the intelligence community.”

Sullivan said he would not confirm or deny the Journal’s reporting but confirmed that Biden had asked that the department “be brought into this assessment because he wants to put every tool at use to be able to figure out what happened here.”

“If we gain any further insight or information, we will share it with Congress and we will share it with the American people. But, right now, there is not a definitive answer that has emerged from the intelligence community on this question,” he added.

Sen. Dan Sullivan (R-Alaska) said on NBC on Sunday that public hearings need to be held on the matter.

“I think we need to have public hearings on this and really dig into it. Think about what just happened over the last three years: one of the biggest pandemics in a century. A lot of evidence that it’s coming from the Chinese, and when other countries even raise it, like Australia, the Chinese use their coercive economic activities to shut people up. So I think we need to do extensive hearings,” he said.

The Republican-held House has launched probes of COVID-19, including the pandemic origins and COVID-19 vaccines.

Rep. Brad Wenstrup (R-Ohio), who chairs the new House Oversight Select Subcommittee on the Coronavirus Pandemic, told The Epoch Times’ sister media NTD Television that investigating the origins is important.

“Specifically to the origins, we feel it’s important to understand the evolution of [it] … and the more we know—whether it’s lab or natural, —the more we know about it, the greater ability we would have to protect ourselves in the future,” he said.

The House Oversight Committee told outlets that intelligence officials did respond to a Feb. 13 missive from Wenstrup and Chair James Comer (R-Ky.) asking for information about the COVID-19 origins. The panel “is reviewing the classified information provided,” the panel said.