PORT-AU-PRINCE, Haiti (AP) — On a recent morning at a hospital in the heart of gang territory in Haiti’s capital, a woman began convulsing before her body went limp as a doctor and two nurses raced to save her.

They stuck electrodes to her chest and flipped on an oxygen machine while keeping their eyes on a computer screen that reflected a dangerously low oxygen level of 84%.

No one knew what was wrong with her.

Even more worrisome, the Doctors Without Borders hospital in the Cite Soleil slum was running low on key medicine to treat convulsions.

“The medication she really needs, we barely have,” said Dr. Rachel Lavigne, a physician with the medical aid group.

It’s a familiar scene repeated daily at hospitals and clinics across Port-au-Prince, where life-saving medication and equipment is dwindling or altogether absent as brutal gangs tighten their grip on the capital and beyond. They have blocked roads, forced the closure of the main international airport in early March and paralyzed operations at the country’s largest seaport, where containers filled with key supplies remain stuck.