"Not a great deal of hope," Cissy Houston on Bobbi Kristina

Los Angeles: Bobbi Kristina Brown's grandmother Cissy Houston has broken her silence on granddaughter's condition, saying there is not a great deal of hope.

The 22-year-old remains critical after she was discovered unresponsive in her bathtub two months ago.

"There's not a great deal of hope," the 81-year-old, who confirmed that Bobbi was recently relocated from her Atlanta hospital to a rehabilitation center, told New York's WBLS.

"I don't pray like that. I give it to God one time, because I know he's able, and I cannot change a thing," Houston explained.

"So I'm asking everyone to pray to the Lord, who we know can do something about it. If he works a miracle, thank God. If it happens the other way, I'm all right."

Whitney Houston had died in similar circumstances in February 2012.