True-to-you.net posted a press release announcing the changes:
Events for this forthcoming week are postponed - but not cancelled - as Morrissey has returned to England where his mother has been hospitalized and is unwell.The singer has 22 more shows scheduled in the U.S. between October 29 and December 8. For a full list of dates, see Morrissey's Facebook page.
Those who have already purchased tickets for the dates in Pittsburgh, Columbus, Flint and Chicago are encouraged to hold on to their tickets and look out for the rescheduled dates. The new dates will be announced within the coming days.
The remainder of the US tour will be unaffected, resuming in Minneapolis on Oct 29.