Ten people overdosed in Baltimore’s Penn North neighborhood on Wednesday, just over two months after a “bad batch” of drugs hospitalized more than two dozen people.

Six people — five men and one woman, ages 30 to 60 — were taken to nearby hospitals, and four others refused treatment shortly after 11:30 a.m., Baltimore Police spokesperson Chakia Fennoy said. There were no fatalities.

Mayor Brandon Scott’s administration sent the city’s Overdose Response Office and Health Department to the neighborhood.

Earlier in the afternoon, Bill Brooks, CEO of Penn North Recovery Center, heard more sirens than usual in the neighborhood, which has the highest number of drug and overdose-related 911 calls in the city.

His team was among several organizations and city agencies that passed out Narcan, an overdose reversal drug, following Wednesday’s overdoses.

Neighborhood residents he ran into blamed those who sell illegal drugs, he said. Many community advocates blamed “testers” from drug dealers for the mass overdose that occurred in July. Testers are samples from a batch of drugs intended to gauge their potency and act as a marketing ploy.

“They’re mad at drug dealers that are making this stuff that’s causing these ODs,” Brooks said, adding, “It’s always something new.”

State testing shows fentanyl is now often cut with chemicals and benzodiazepine derivatives, making the drug supply more unpredictable and deadly. It’s unclear what caused the mass overdose on Wednesday.

An ambulance with its lights flashing was parked at the bus stop at the intersection of Pennsylvania and North avenues as Natasha Witherspoon commuted home from her job at a supermarket Wednesday afternoon. The stop, typically crowded with people selling drugs or dozing off from a high, Witherspoon said, was unusually quiet in the wake of the day’s overdoses.

It was a dramatically different scene from the mass overdoses in July, when hundreds of outreach workers from community organizations and first responders alike scoured the streets, searching for people who needed help or Narcan. A week later, five more people overdosed in the same neighborhood.

The quick and widespread community response during the mass overdoses this summer helped prevent any fatalities as more than two dozen people were rushed to hospitals.

That was a “madhouse,” said Witherspoon, who lives in the neighborhood. “It’s tiring at this point. It’s killing the community.”

Baltimore’s fatal overdose rate has surpassed that of any other large city in the country. People have died from overdoses on a third of city blocks at an average rate of two to three each day.

The city has a plan to reduce overdose deaths 40% by 2040, including around-the-clock outreach teams and safe spaces where people can rest and receive resources. The city also held public hearings where community members can testify about the toll of addiction.

This article has been updated.

Banner reporter Sara Ruberg contributed to this report.