Everybody on board a Peruvian Airlines flight survived when the plane caught fire after landing.
The move to invoke Article 50 of the Treaty of Lisbon will come nine months after the "Brexit" referendum.
Members of congress are convinced now is the time for a full-scale inquiry linked to Russia's alleged interference in the 2016 election.
Experts say buying homes for cash and then later taking out mortgages can raise suspicions.
Banking sources said some transactions raised sufficient concern to trigger an internal investigation into potential money laundering activities.