Report: Crack in San Francisco's Millennium Tower window caused by 'exterior impact'

SAN FRANCISCO (KGO) -- There are new developments in the case of a cracked window at San Francisco's sinking and leaning Millennium Tower.

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New photos offer a close-up view of the break that happened on the 36th floor over Labor Day weekend.

A report has concluded the break was not related to building movement and settlement. Rather, it was cause by an "exterior impact."

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The owners of the unit say they were awoken in the middle of the night by a massive bang.

It could take several months to replace the window.

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Take a look at the latest stories and videos on the Millennium Tower here.