During a Zedd concert, one person is dead and two others are in serious condition following apparent overdoses at a concert at the House of Blues in Boston early Wednesday morning.

Boston police said they responded to the report of overdoses. When officers arrived, they said they discovered three people had been taken to Beth Israel Hospital suffering from overdoses from an unknown substance taken at the show. One of the three victims later died after arriving at the hospital. The other two are currently in critical condition.

Due to the tragedy, the show tonight was cancelled pending further investigation.