The New York City Mayor’s officeannounced on Sunday that Electric Zoo Festival would be canceled.

The third and final day of the popular musical festival was scheduled for Sunday, but due to suspected drug overdoses, it will not go on.

From the city’s official statement:

“During the first two days of the Electric Zoo music festival, two concert-goers have died and at least four others became critically ill and have been placed in intensive care at area hospitals. Definitive causes of death have not yet been determined, however, both appear to have involved the drug MDMA (ecstasy, or molly).”

The festival takes place annually over Labor Day Weekend on Randall’s Island. This year’s biggest acts included David Guetta, Avicii, and Benny Benassi.