Published: Mar 22, 2013 6:39 PM EDT

BIRMINGHAM, Ala. (AP) - A sign at the Birmingham airport fell on a family Friday, killing a 10-year boy and injuring other family members.
    
Deputy Coroner Derrick Perryman said 10-year-old Luke Bresette was pronounced dead at Children's of Alabama hospital. Two other children were being treated there. The mother, Heather Bresette, was taken to University Hospital, where spokeswoman Nicole Wyatt said she was in critical condition.
    
Firefighters estimated the sign weighed 300 to 400 pounds. Airport spokeswoman Toni Herrera-Bast said officials aren't sure how the sign fell. She said it happened about 1:30 p.m. Friday in a pre-security area of the airport. The airport continued operating while rescue workers tended to the family.
    
The airport completed the first phase of a more than $201 million modernization effort and opened newly renovated concourses last week.

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