Pittsburgh police said the incident was an 'isolated drug overdose event'

At least three people wearing orange paper wristbands have died and four others have been hospitalized due to a 'drug overdose' in a Pennsylvania neighborhood.

Director of Public Safety, Wendell Hissrich, confirmed the deaths and hospitalizations of the seven male victims after authorities responded to the incident just before 7.30am Sunday morning.

Authorities said the incident was an 'isolated drug overdose event' that happened after the men left a party.

The four hospitalized victims were taken to Pittsburgh Mercy Hospital where their conditions initially ranged from serious to critical. By 11.30am one victim remained in critical condition and the other three were said to be stable.

At least three people wearing orange paper wristbands have died and four others have been hospitalized due to a 'medical situation' in a Pennsylvania neighborhood. Photos showed police cars parked outside the Southside Works City Club Apartments (pictured)

Photos from KDKA reporter Chris Hoffman showed police cars parked outside the Southside Works City Club Apartments, but it's unclear where exactly the incident occurred.

'We have no indication there was a party there,' Hissrich said, referring to the apartment complex.

According to a police statement, five victims were found in one of the Southside Works City Apartments.

Two were pronounced dead at the scene and the other three were taken to the hospital.

The sixth victim was found in an elevator outside the apartment. He later died at the hospital.

Police said the seventh victim was found on the sidewalk near 26th and Carson streets and was taken to the hospital.

Police said the victims had all attended a party or event in which guests were given orange wrist bands

According to a police statement, five victims were found in one of the apartments (building pictured), one was found in elevator outside the apartment and the seventh victim was found on the sidewalk near 26th and Carson streets

All of the victims were wearing orange paper bands on their wrists, according to a police statement.

Police said the victims had all attended a party or event in which guests were given orange wrist bands.

Investigators have identified two venues that were using orange wrist bands Saturday night.

Authorities confirmed that the incident was not a widespread situation.

Hissrich said Pittsburgh EMS checked the building's air quality and have found no danger to the building's other residents.

An investigation is ongoing and police said they will release more details as they come available.

In a statement to WTAE, City Club Apartments said: 'The individuals that were involved in the incident were not residents of our community.

'It is our understanding that they were acquaintances of a resident in good standing. It is also our understanding that the group had attended an outside event before returning to the apartment.

'We express our deepest sympathies to the families and friends of the affected individuals.'

Anyone who attended or has knowledge of the party have been asked to contact police at (412) 323-7141.