US Secretary of State Mike Pompeo has been subpoenaed.
A Democratic-led US House of Representatives committee issued the order on Friday.
They want to him to hand over documents regarding contact the US government had with the Ukrainian government.
Earlier this week House Speaker Nancy Pelosi launched a congressional impeachment inquiry of US President Donald Trump.
Saudi Arabia trust with Iran hard to 're-establish', foreign minister says
Saudi Arabia reserves the right to act militarily against Iran and any trust with Tehran has been shattered, the Saudi foreign minister Prince Faisal bin Fahran said early on Thursday, after Riyadh was targeted by Iranian ballistic missiles.
Kuwait foils terror plot targeting vital facilities
Kuwait's Ministry of Interior says the State Security Service has foiled a terrorist plot targeting key installations in the country.
Qatar declares Iranian attachés 'persona non grata'
Qatar’s Ministry of Foreign Affairs has declared Iran’s military and security attachés in Doha persona non grata, ordering them, along with their staff, to leave the country within 24 hours.
Debris from intercepted missile injures four in Riyadh
Saudi Arabia’s General Directorate of Civil Defence says emergency teams responded on Wednesday to falling debris from an intercepted ballistic missile over a residential area in Riyadh.
Iran hits Qatar refinery, targets Saudi Arabia, after huge gas field struck
Iran's huge Pars gas field was hit on Wednesday in a major escalation in the US-Israeli war that sent oil prices shooting higher, and Tehran struck Qatar and fired missiles at Saudi Arabia.
