"We plan to hold hearings," said Rep. James Comer, chairman of the House Oversight Committee.
It was on Monday that the interview with 36-year-old Air Force veteran David Charles Grusch was published in the online magazine The Debrief.
Grusch said he left his government post in April to be able to speak freely and push for the authorities to be held accountable.
'Credible data'
He says he has not seen any of the finds, but that he has credible information from other people.
"There were several high-ranking former intelligence officers who approached me, many whom I had known throughout my career, who told me that they were participating in a program," he said in another interview, according to The Independent.
The program must have consisted of the systematic collection of craft or debris from foreign craft that have landed or crashed on Earth. Unique atomic structures and unique radiation show that they were not manufactured by humans, Grusch says.
Turned to Congress
Grusch also said he sent a hundred-page transcript of the calls to Congress and was retaliated by his employer afterward.
The information is supported by another intelligence officer who is speaking out publicly for the first time, writes The Debrief.
"The phenomenon of non-human intelligence is real. We are not alone," said Jonathan Grey, UFO analysis at the National Air and Space Intelligence Center (NASIC).
He says that the finds have been used to develop his own military capabilities, but that it is no longer necessary to keep their existence secret.
"Biggest news in world history"
DN journalist Claes Svahn, chairman of UFO Sweden, writes in a comment in DN that Grusch has come up with the biggest news in world history - if it turns out to be true.
The US space agency Nasa says in a statement that it has no credible evidence of UFOs from other planets.