NEW YORK -- Producers plan to close half of Broadway's shows on September 11 due to a sharp drop in advance ticket sales for that day and the continuing bad economy in New York City, news reports said Tuesday.

Fears of possible repeats of terrorist attacks against New York City are keeping theatergoers and tourists away on the first anniversary of the terrorist attacks that destroyed the World Trade Center, reports said.

Among the shows that will go dark on September 11 and probably for days after are musicals like *** "Chicago", "Les Miserable", "Oklahoma!", "Phantom of the Opera"*** and *** "42nd Street"***, DPA reported.

The first anniversary falls on a Wednesday, which is usually a two-show day on Broadway, when producers expect to sell more tickets.

News reports said that 10 shows will be performed while 13 others will stay dark that day.

The League of American Theaters and Producers, which is Broadway's main trade group, said that only one in three theatergoers has bought tickets four weeks in advance, half the normal rate.