Overturned semi-truck blocks SoDo street

Updated:

An overturned semi blocked First Avenue in SoDo.

SEATTLE - The southbound lanes of First Avenue in SoDo were blocked Wednesday morning after a semi-truck overturned, police said. 

The incident happened at First Avenue South and South Horton Street around 8:45 a.m. 

A westbound ramp from First Avenue was blocked. 

Police are still investigating the incident because an unknown fluid is leaking from the semi.

At this time, it is unknown what caused the truck to overturn.

There were no injuries reported and no other vehicles were involved.