Organizers are reporting as many as 800,000 people gathered in Washington, D.C., on Saturday afternoon for the anti-gun violence rally, NBC reported. 

Rebecca Shabad, a congressional reporter for NBC News, tweeted that "March for Our Lives" officials told her the estimate around 3 p.m. Saturday. 

D.C. metropolitan police have not yet released their approximate crowd size.  

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The current estimate of "March for Our Lives" attendees exceeds most estimates of President TrumpDonald John TrumpTrump rips Dems' demands, impeachment talk: 'Witch Hunt continues!' Nevada Senate passes bill that would give Electoral College votes to winner of national popular vote The Hill's Morning Report - Pelosi remains firm despite new impeachment push MORE's inauguration crowd size. The Washington Post estimated in 2017 that around 600,000 people attended Trump's inauguration.

Thousands of American students gathered all across the country, inspired by the student survivors of the Parkland, Fla., school shooting who organized the D.C. march.  

Updated 3:46 p.m.