JEFFERSON CITY, Mo. (AP) — Missouri Sen. Claire McCaskill on Tuesday canceled her campaign events for the remainder of the week in order to spend time with her critically ill mother.

McCaskill’s 84-year-old mother, Betty Anne McCaskill, was in an intensive care unit of a St. Louis hospital Tuesday after “becoming critically ill,” said McCaskill campaign spokeswoman Caitlin Legacki. The campaign did not disclose any further details about her ailments.