The subpoenas were expected to be delivered to retired Army General Michael Flynn, who was sacked as national security adviser by Trump in February, and the president's personal lawyer, Michael Cohen, the sources said.
The House Intelligence Committee issued seven subpoenas today, as separate House and Senate investigations involving the 2016 USA presidential election accelerate and expand in scope. Flynn reportedly plans to invoke his Fifth Amendment rights in response to a separate subpoena issued by the Senate Intelligence Committee.
The subpoenas or summon first issued by the House panel has demanded their testimony, as well as documents from their businesses.
"We will continue to pursue this investigation wherever the facts may lead", the statement read.
Last week, the Senate intelligence committee voted to give broad subpoena power to the two leaders of their investigation, Sen. Rep. Mike Conaway (R-Texas) has taken over the probe in Nunes's place, and the fracas has largely died down since.
They are focused on the accusations of collusion between the Trump campaign and the Russian government, as well as on Flynn, who was sacked three weeks into the new administration for lying to Vice President Mike Pence about his meetings with Russian officials. But authorized US officials can request that the names be revealed to them - a process known as "unmasking" - if knowing the name is necessary to understand the intelligence.
Flynn was sacked by Trump in February after revelations that he misled administration officials about his contacts with Russia's ambassador.
The panel is investigating Russian efforts to influence the United States election, as well as leaks of classified information and reports that identities of Trump associates captured in spy intercepts may have been improperly unmasked.
Meanwhile, Trump and Russian President Vladimir Putin sounded similar tones as they criticized the ongoing US scrutiny of Russia's attempts to sway the presidential election.
"To date, there has not been a single witness, document or piece of evidence linking me to this fake Russian conspiracy, " Cohen said in a text message to USA TODAY on Tuesday.
The development comes amid news the House Intelligence Committee has compiled a list of more than twenty people who members would like to testify in the probe. Pearson reported from NY.
Flynn and three other former Trump campaign operatives: former campaign chairman Paul Manafort, former adviser Roger Stone and former foreign policy adviser Carter Page - have been the central focus of congressional investigators for months now.
At the beginning of April, Democrats were accusing Nunes of coordinating with the Trump White House to derail the House Russia probe.
But Republicans want to know if any of those requests were politically motivated.
The panel also issued subpoenas for documents related to "unmasking" of names separate to the Russian Federation investigation.