Demonstrators are expected to gather in D.C. Saturday in a rally for Trayvon Martin, an unarmed black teenager who was fatally shot by a neighborhood watch captain in Florida last month.

We are REALLY gaining momentum for the rally! 3/24/12 Freedom Plaza Washington, DC!!! YES!

— Justice For Trayvon(@DCTrayvonRally) March 21, 2012

The “Stand Up For Trayvon Justice Rally” will be held from 2 to 4 p.m. Saturday at Freedom Plaza, 14th Street and Pennsylvania Avenue NW. News of the rally spread through social media.

View live tweets from The Post’s Ovetta Wiggins after the jump:

More on Trayvon Martin:

‘If I had a son, he’d look like Trayvon,’ Obama says

Details on George Zimmerman muddy racial accusations in shooting of teen

The battle over ‘Stand Your Ground’ laws

Trayvon Martin’s parents speak out