|Donald Trump is welcomed by Saudi King Salman bin Abdulaziz al Saud|
Although the date of the hearing has not yet been set, it will be scheduled after the 29 May Memorial Day holiday, the committee said.
|Donald Trump and Melania Trump step off Air Force One|
Donald Trump and Melania Trump step off Air Force One
Top Democrat on the Senate Intelligence Committee, Mark Warner, said in a statement: "Director Comey served his country with honour for many years, and he deserves an opportunity to tell his story. Moreover, the American people deserve an opportunity to hear it."
Trump departs on first foreign trip: where's he going?
The development will come as blow to White House efforts to dampen down interest in the Russia investigation as Mr Trump arrived in Saudi Arabia for his first foreign trip as president.
The White House has been thrown into turmoil by a string of allegations against Mr Trump this week, including that he may have obstructed justice by asking Mr Comey to drop an investigation into one of his top advisers.
On Friday, The Washington Post reported that a senior White House official was now under investigation as part of an inquiry into Russian efforts to tilt the elections in Trump's favour.
And The New York Times said the US president had told top Russian officials Mr Comey's sacking had relieved "great pressure" on him.
:: Trump: Firing 'nut job' Comey 'relieved pressure'
Mr Trump told Russian Foreign Minister Sergei Lavrov last week that Mr Comey was a "nut job," according to the Times, citing notes taken at the meeting and read to the paper by a US official.
That flies in the face of the White House's public insistence that Mr Comey's dismissal was not linked to his ongoing investigation.
On Thursday, Mr Trump declared himself the victim of the "greatest witch hunt" in American political history and denied allegations of collusion.
:: Could Donald Trump be impeached?
Earlier this week, the Justice Department appointed former FBI director Robert Mueller to oversee an independent inquiry into contacts between Russia and the Trump campaign.