INDIANAPOLIS -- The Indianapolis Symphony Orchestra is canceling a fifth week of concerts as contract negotiations with the musicians union remain deadlocked.

The orchestra's management locked out its some 80 musicians in early September after the previous contract expired. Orchestra officials announced late Sunday that concerts scheduled for Friday and Saturday were being called off.

The two sides are split over a push by management to cut salaries and shorten the symphony's current year-round schedule because of shortfalls in private donations and other revenue. The latest proposal would cut base musician pay by about one-third to $53,000 a year.

The Indianapolis Star reports more than 1,000 people attended a musicians-organized concert Sunday at the Palladium in Carmel, with some of the ticket sales going to the Indianapolis-based New World Youth Orchestras.