MANSFIELD, Mass. (WHDH) -- Two people died and nearly 50 people were arrested during the Identity Tour concert at the Comcast Center in Mansfield Thursday night.

Officials say the two deaths were a result of drug and alcohol use.

“The problem last night was the people getting sick from illegal substances,” said Arthur O’Neill, Mansfield Police chief.

Investigators say emergency crews had a busy night at the Identity Tour, an all-day rave concert.

Police say two young men died from the effects of drugs and alcohol in their system. Close to two dozen other people were transported to area hospitals, treated for drug-related issues.

“PCP, LSD, ecstasy, marijuana, and alcohol,” said Chief O’Neill.

Police say aside from the deaths and those hospitalized, 45 people were arrested on a variety of charges.

Investigators say young people come to concerts like the Identity Tour to experiment.

“The fact that they’re willing to almost cook some stuff up in their homes, bring it in and basically test it out on people to see how it works out, and that people are actually willing to do that,” said Det. Sgt. Ronald Sellon, Mansfield Police Department.

Friends of the 19-year-old from Acton who died told 7News they’re devastated.

“I’m just in complete shock from the whole situation. It’s a lot to handle and take in at one time. He was a really good kid,” said Jesse Kirkland, friend of victim.

The chief says he is frustrated with the use of drugs and alcohol at concerts.

“You tell your kids not to do this and they look you right in the eye and say they’re not going to do it, but some do,” said Chief O’Neill.

The chief says he would like to see the raves at the Comcast Center done away with.

Those arrested will appear in court at a later date.