Red Court gas

"There were many injuries," Luccio continued. "But as the hospice in Sicily had been taken, we diverted the worst cases to a hospital we control in the Congo." She stared at her bottle for a moment. Her mouth opened, and then she closed it again. She closed her eyes.
Morgan frowned at her. Then he put a hand on Luccio's shoulder, looked at me, and said, "The vampires knew."
I got a sick, twisting feeling in my stomach. "Oh, God."
"It was daylight there," Morgan said. "And the place was a fortress of the Merlin's wards. There was no way for the vampires to breach it from the Nevernever, and nothing short of a demon lord could have broken through them." His mouth twisted, and his eyes glittered with rage and hate. "They sent mortals against us. Against men and women lying injured, unconscious, helpless in their beds." The anger in his voice seemed to strangle him for a moment.
"But..." I said. "Look, I know what it's like going up against mortals you don't want to kill. It's difficult, but they can be stopped. Fought. Bullets and explosives can be defended against."
"Which is why they used gas," Ramirez said quietly, stepping in where Morgan's and Luccio's voices had failed. His own tone was serious. His grin had vanished. "A nerve agent, probably sarin. They deployed it against the entire hospital, the people we had protecting it, and six square blocks of city around it." He put his own bottle down and said, "No one survived."
"My God..." I whispered.
There was dead silence.
"Ebenezar?" I asked in a whisper. "You said he was wounded. Was he..."
Ramirez shook his head. "Stubborn old bastard wouldn't go to the hospital," the young Warden said. "He went with one of the teams staging a counteroffensive with the Fellowship of Saint Giles."
"Thousands of innocent mortals died," Luccio said, and there was a slow, low snarl in her voice. She kept it tightly leashed and under control, but I heard it. I recognized it, and I knew what it was like to feel it permeating my words. "Women. Children. Thousands. And today I buried one hundred and forty-three Wardens."
I sat there, stunned.
In a single, vicious stroke, the Red Court had very nearly destroyed the White Council.

Dead Beat Chapter 31, Page 277-278