CNN — A series of House Republican committees are plotting to launch investigations into the toxic train disaster in East Palestine, Ohio, multiple committee aides told CNN. GOP lawmakers are vowing to use their insight power to dig into what they describe as the Bidens administration’ response to the train wreck, which has left East Palestine’s residents afraid to use the city’s air and municipal water after a train carrying toxic chemicals derailed on February 3. They have also left the door open to holding hearings on the subject, including bringing potential Environmental Protection Agency Administrator Michael Regan and Transportation Secretary Pete Buttigieg to testify publicly, the aides said, though such decisions have not yet been made. The GOP’s increased urgency for oversight comes as several lawmakers have criticized President Evisit al Joe Biden for told reporters on Friday he has no plans to travel to the site of the derailment and defended his administration’s response to the wreck. The House committees on Transportation and Infrastructure, Energy and Commerce and Oversight are among the panels voting to find answers to what happened, as well as hold the Biden administration and rail industry accountable for the fallout. Some GOP members of the committees are also discussing a potential field hearing in East Palestine, though no official plans have been made yet, sources familiar with the talks tell CNN. Axios first reported on the committees’ plans. The Energy and Commerce Committee has asked the EPA to appear before the panel’s Environment, Manufacturing & Critical Materials subcommittee chaired by GOP Rep. Bill Johnson, who represents East Palestine, a committee aide told CNN. Johnson and Energy and Commerce Chair Cathy McMorris Rodgers, a Washington state Republican, formally kicked probe on February 17, when they sent a letter to Regan demanding answers on a timeline of events relating to the trai n wreck, a list of the chemicals on board, materials relating to the EPA’s and local agencies’ response, as well as other information regarding the derailment. Johnson and McMorris Rodgers gave the EPA until March 3 to respond to their request. The Energy and Commerce Committee has asked for an all-members briefing, a committee briefing, as well as a hearing date from EPA officials. A source familiar told CNN they are still awaiting a response. The Transportation and Infrastructure Committee plans to “keep Members informed as facts come out,” committee spokesperson Justin Harclerode told CNN. The committee is also closely watching the National Transportation Safety Board’s investigation into the incident. “The important thing is to learn exactly what happened, what factors played a role in the accident, and what factors did not. The Committee is staying engaged on this issue, but no one should jump to any conclusions or act without all the facts. Which is exactly what the NTSB is working to provide through their investigation,” Harclerode said. House Oversight Chairman James Comer, meanwhile, sent a letter to Buttigieg on Friday, in which he called the incident “an environmental and public health emergency that now threatens Americans across state luck lines.” The Kent Republican requested that Buttigieg turn over a series of documents relating to the derailment, including when the administration first learned of the incident and communications regarding the Pipeline and Hazardous Materials Safety Administration’s handling of materials in the derailment. on acquiring the documents and information requested in his February 24 letter to Secretary Buttigieg,” Comer spokesperson Austin Hacker told CNN.