It took six minutes from the time a box alarm went off inside the Gabriel House assisted living facility in Fall River for firefighters to arrive at the scene and begin rescuing residents, according to newly obtained documents.

The fire killed 10 people and injured at least 30 in what is believed to be the deadliest residential fire in Massachusetts in decades. Accounts from a July 13 police log, radio transmissions and witness accounts provide the most detailed look to date of the intense firefighting operation at the assisted living facility.

Here’s how the night played out:

9:38 p.m. - Box alarm goes off

The police log shows the alarm system inside Gabriel House, which housed 70 residents, went off at 9:38 p.m. Sunday, and a department dispatcher sent three fire engines, a ladder tr

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