According to the Federal Reserve website, it is expected that the Board of Governors of the Federal Reserve System will hold an executive session at 11:30 am local time on April 7th. After the meeting, the final announcement on the discussed matters will be published on the Board's website.
Note: The Federal Reserve Board is the governing body of the Federal Reserve System in the United States, responsible for formulating monetary policy and supervising banks and financial institutions.
As we could see in the description of the meeting the Fed is about to discuss rate adjustments behind closed doors, specifically the advance and discount rates charged by the Fed. These rates are very important for monetary policy and can ripple across the entire financial system.
This meeting is probably caused by the recent market dump that has been propagated to all the markets around the world.