[Updated 10:24 a.m.] 7th Avenue has been reopened in New York's Times Square. Police have determined that an unattended backpack was harmless.

[Posted 9:53 a.m.] Police have shut down New York City's Times Square to traffic Tuesday as they investigate a suspicious package left aboard an MTA bus, authorities said.

The unattended backpack was discovered aboard the bus along a 7th Avenue between 49th Street and 50th Street, police said.

This story is developing. We'll bring you the latest information as soon as we get it.