MEXICO CITY, Mexico (CNN) -- Ten people have been killed in a shooting at a drug rehabilitation center in a Ciudad Juarez, Mexico, state-run news agency Notimex reported.
Police gather at the rehab facility where 17 people were killed in Ciudad Juarez, Mexico, in early September.
Three others were injured when unidentified gunmen opened fire Tuesday night, the agency said.
It was the third such incident at a drug rehab clinic this year in the Juarez, across the border from El Paso, Texas.
The attackers entered the Vida Rehabilitation Center about 10:30 p.m., Notimex reported.
Seven victims were patients at the clinic. The others included a doctor and the clinic manager, according to the news agency.
Drug-related killings in Juarez began to spike in early 2008, when the Sinaloa drug cartel began a turf war with the Juarez cartel.
Including the deaths at the clinic, at least 22 people were killed in Juarez on Tuesday.
The number of drug-related killings in the city this year has reached at least 1,657, surpassing the death toll for all of 2008.
Gunmen shot and killed 18 patients and wounded two others this month at another rehab center.
In March, 20 patients at another drug facility were killed in a similar attack.