Updated July 9, 2018, 4:06 p.m.
UPDATE: WINNEBAGO COUNTY, Ill. (WIFR) - The Winnebago County Sheriff's Office says two people have minor injuries from Monday afternoon's accident on I-39.
The driver of a vehicle pulling a travel trailer told investigators that wind from a passing semi overturned the trailer. The two people in that vehicle have minor injuries.
During the traffic backup, a second accident happened at Baxter and South Mulford roads.
Deputies say a driver from Missouri treated the intersection as a four-way stop, instead of a two-way stop and crashed into a car traveling eastbound on Baxter.
One person in the car from Missouri has minor injuries.
The Illinois State Police say I-39 is clear and open.
Updated July 9, 2018, 3:51 p.m.
UPDATE: WINNEBAGO COUNTY, Ill. (WIFR) - At least one northbound lane has reopened on I-39 following an accident Monday afternoon.
We will continue to update you as we learn more about the accident and lane closures.
Posted July 9, 2018, 2 p.m.
WINNEBAGO COUNTY, Ill. (WIFR) - An accident closes down the northbound lanes of I-39 Monday.
The accident happened just before 1:30 p.m. south of the Baxter Road exit.
At this time, the accident is blocking both northbound lanes. Traffic is slow moving in the southbound lanes.
We will continue to update you as we learn more.