CHARLOTTE, N.C. -- Two wrecks caused major delays on Interstate 77 and Interstate 85 Wednesday morning.

An overturned vehicle blocked all lanes on I-77 south near Arrowood Road around 7 a.m.

Emergency crews blocked traffic while they worked to clear the scene for about an hour. One person suffered potentially life-threatening injuries.

Traffic on I-77 south was backed up several miles. There were was also onlooker delays on I-77 north due to the wreck.

A wreck on I-85 near Mallard Creek Church Road also caused heavy delays for northbound traffic. At point, the backups stretched for six miles.

All lanes in both accidents have been cleared and traffic is slowly moving, according to WCNC Traffic.

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