UPDATE (12/18, 7:07 p.m.): The number 1 and 2 lanes reopened and traffic is no longer being diverted, according to CHP.

Crews are on-scene cleaning up carrot mulch on the roadways.

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A semi-truck lost its trailer and blocked traffic on southbound Highway 99, just south of Highway 58 Monday evening. 

The trailer became detached just before 6 p.m. and temporarily blocked all southbound lanes of traffic on Highway 99. 

Within about 30 minutes, crews were able to move the trailer to the right-hand shoulder but traffic is still currently stopped. 

The trailer was carrying carrots which spilled all over the freeway. Hazmat crews and CHP are on-scene cleaning up.

Traffic is being diverted off at Stockdale Highway. Eastbound 58 to southbound 99 is closed.

This is a breaking news story, refresh for updates.