Bret Michaels remains hospitalized in critical condition following a brain hemorrhage Thursday night, his tour manager said in an update posted to his Web site Sunday.
"He is under 24 hour doctors' care and supervision," wrote Janna Elias of the rocker, 47, who is in the intensive care unit. "We are hopeful that further tests will locate the source of the bleeding, which has still not been located.
"As we all know, Bret is a fighter and we are hopeful that once all is complete, the slurred speech, blurred vision and dizziness, etc. will be eliminated and all functions will return to normal," Elias continued.
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She said Michaels' team was grateful for the outpouring of support.
"Everyone at Michaels Entertainment would like to thank all fans and friends for their continued thoughts and prayers through this difficult time," she wrote.
Michaels' father Wally Sychak told RadarOnline.com he spoke to his son in the hospital Friday morning.
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"He sounded upbeat and positive but they had him sedated," Sychack said. "But he's doing good. [sic] He sounded like my son."
Sychak says doctors believe Michaels' hemorrhage -- and emergency appendectomy earlier this month -- are complications from his type 1 diabetes.