While Mayor Bob O'Connor's battle with brain cancer continued at UPMC Shadyside, mayoral spokesman Dick Skrinjar told reporters tonight that Pittsburgh Mayor Bob O'Connor's medical condition was deteriorating.

Mayoral spokesman Dick Skrinjar gave reporters the update at the City-County Building around 10:30 p.m.

"The mayor has gone from day-to-day to hour-by-hour," Mr. Skrinjar said. He added that Mr. O'Connor was surrounded by family members and friends and that he was not on any life support.

City Council President Luke Ravenstahl, who would succeed Mr. O'Connor as mayor, remained in the City-County Building awaiting reports from the hospital. Throughout the night, city officials came and went.

City staff members were on call, in case word came that a late-night swearing in ceremony would be necessary.

The mayor is in the intensive care unit of UPMC Shadyside Hospital, battling primary central nervous system lymphoma and complications that have included seizures and infections. The hospital system has not issued an update on his condition since Tuesday at 3 p.m., and has referred all questions to Mr. Skrinjar.

The mayor has been hospitalized since July 10, and Deputy Mayor Yarone Zober is heading the administration in his absence.

More details in tomorrow's Pittsburgh Post-Gazette.