Broadway theaters have extended their closures because of the coronavirus pandemic until at least 6 September, the Broadway League industry group said.

Among the most-visited tourist attractions in New York, the theaters had initially set a tentative reopening date of 7 June.

The Broadway League, which represents producers and theater owners, said on Tuesday it was working with government authorities, unions and health experts to develop plans tore-open with new safety measures for audiences, performers and stagehands.

Live theater productions face unique challenges in the pandemic, including a large number of people in small spaces and physical contact among performers on stage.

Producers are discussing staging shows with smaller casts rather than big musicals, and writers have been working onstories that allow for social distancing.

Broadway closed its theaters on 12 March. Thirty-one shows were playing at that time including hits such as "Hamilton,""Harry Potter and the Cursed Child" and "To Kill a Mockingbird."