Big rig crash slows traffic on Katy Freeway at Pederson

A crash involving an 18-wheeler closed several lanes on both sides of the Katy Freeway at Pederson Road Thursday.

The wreck was reported around  4 a.m.

No one was hurt, police said.

The cause of the crash is under investigation.

It is unclear when the lanes will reopen.

Commuters should use caution and expect delays.