Following last night’s tragic shooting in Las Vegas, killing 50 and injuring over 400, residents of Sin City are lining up in droves to donate blood.

Local reporters say there were lines around the block across the city to give blood. As early as 3 a.m., parking lots were full at donation centers, and hundreds of donors desperate to help in any way they can.

Check out some of the residents’s Twitter pages:

If you would like to donate blood for the injured victims of the Strip shooting visit the Labor Health & Welfare Clinic, 7135 W. Sahara.

— LVMPD (@LVMPD) October 2, 2017

The line at the united blood service on Whitney Ranch location. So happy to see so many people coming out to help. #LasVegas #mandalaybay pic.twitter.com/Xo8X3Qu661

— Jourdan Lasko (@Heilos) October 2, 2017

This is the scene at one of the local blood banks (United Blood on W Charleston). Vegas is an amazing community. Our city is coming together pic.twitter.com/Xk7zTZWOR6

— Dave Farra (@DaveFarra) October 2, 2017

Cannot believe what happened in my city. #prayforvegas #route91harvest Now waiting in line with lots of others to donate blood. pic.twitter.com/0NwAkI8DRc

— Kirk Zylstra (@kirkdz) October 2, 2017