(CNN) - Relatives of Eunice Kennedy Shriver were summoned to a hospital on Cape Cod, Massachusetts Monday, a source close to the family told CNN.
"It's minute-to-minute right now," the source said.
Shriver, 88, has been was in the hospital for several days, her family said, and her relatives were summoned after she suffered a "setback," the source said.
Shriver founded Special Olympics. She is the sister of former President John F. Kennedy.
My prayers go out to this family and I pray Mrs. Shriver isn't suffering.
God speed to the sister of one of the greatest Presidents this country ever had. Our prayers are with you.
very sad. thoughts and prayers for Maria and the rest of the family. Eunice did an extraordinary amount of good in her life.
My thoughts and prayers are with the family at this time. The Kennedy family has been an important family in American history and I'm praying and hoping for a miracle for her. Hope she survives this ordeal.
She's a great lady. If recovery is not in the cards then may God grant her a speedy departure from this earth so that she may not suffer unnecessarily.
This lovely lady has a beautiful soul. I'm praying for her and all who love her.
My thoughts and prayers go out to the Kennedy/Shriver families. They have been significant in US history.
She's a Kennedy enough said, respect earned. May she rest in peace.
My prays to each of her family memeber. The World will truly be a "colder" place without this good woman.