One person died and 20 others hospitalized after attending the Mad Decent Block Party in Columbia, Maryland last night. According to CBS DC, Howard County police say that 20-year-old Tyler Fox Viscardi, of Raleigh, NC, was pronounced dead at an area hospital. The suspected cause of death is drug-related. This is also reportedly the case with most of the 20 hospitalized. A 17-year-old from Woodbridge, VA is currently in critical condition after suffering an overdose. Additionally, officials also issued 50 citations for under-age drinking and made three arrests. One arrest was for an assault on a police officer, another for domestic assault, and a third for possession with intent to distribute marijuana. Diplo took to Twitter to offer his condolences to those affected.