The former Smiths singer was "stable" at a hospital in Swindon, England, on Sunday morning, the British news agency Press Association quoted a hospital spokeswoman as saying. It did not name the spokeswoman.
Fans quoted by Press Association and the Sunday Telegraph newspaper said Morrissey, 50, was performing at the Oasis Leisure Centre in Swindon when he was stricken and the show was cut short. Two band members rushed to his side and dragged him offstage, PA said.
A spokeswoman for the Great Western Ambulance Service said their ambulance service had been called to pick up a 50-year-old man, whom she did not name, for "respiratory problems" and brought him to the hospital.