A second whistleblower has come forward in the impeachment inquiry against US President Donald Trump.
Mark Zaid, a lawyer for the original whistleblower in the case, said he would be representing a second whistleblower who had direct knowledge of the White House dealings with Ukraine.
He said the person is also an intelligence official.
The impeachment inquiry has centered on Trump's attempts to get Ukrainian president Volodymyr Zelensky to open an investigation into former vice president Joe Biden and his son, Hunter.
Trump and his Republican supporters have dismissed the complaint as politically motivated hearsay.

Bangladesh leader considered PM frontrunner returns from exile
Five killed in Nigeria mosque attack, police say
Helicopter crash on Tanzania's Mount Kilimanjaro kills five, aviation authority says
UK, Canada, Germany and others condemn Israel's West Bank settlement plan
Discovery of a million more potential Epstein documents delays further releases
Russia plans nuclear power plant on the moon within a decade
Southeastern Taiwan shaken by 6.1 magnitude quake
At least two killed in Pennsylvania nursing home explosion
