The vehicle, which contained between 20 and 50 bodies, was found in an emergency lane off the highway.
There were several hundred people on board and some appeared to have been trapped in the hold when it capsized.
The president praised its "extraordinary resilience" a decade after the storm devastated the Big Easy.
Clashes spread after police arrested a young leader of the influential Patel clan.
Investigators in the sensational Sheena Bora murder case are not ruling out the "honour killing" angle.
A man shot and killed a police officer in Louisiana and stabbed three women, one of them fatally.
All are accused of dereliction of duty and abusing their positions
Holmes murdered 12 people during a midnight showing of the Batman movie 'The Dark Knight Rises' in Aurora.
Conflicting reports over the alleged suicide of disgruntled former employee.
Dr Asim Hussain was the petroleum minister in the past PPP-led government.
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