Update: A second attendee of this weekend’s Mad Decent Block Party in Columbia, MD has died, according to InsideNova.com. The attendee was a 17-year-old high school senior.

A 20-year-old has been pronounced dead and a 17-year-old is in critical condition following this weekend’s Mad Decent Block Party at Merriweather Post Pavillion in Columbia, MD. 20 in total were taken to the hospital, with most cases appearing to be drug related.

Tyler Fox Viscardi of Raleigh, NC was escorted to a local hospital around 9 PM on Friday for an apparent overdose, and passed away a short time later. 

Police also issued 50 citations for under age drinking and arrested three: for assaulting a police officer, domestic assault, and possession with intent to distribute marijuana.

Mad Decent Block Party is a traveling festival headed up by Diplo’s label Mad Decent.Â