An accident involving multiple vehicles closed eastbound Interstate-40 near the Walnut Canyon Exit Wednesday morning at around 8:50 a.m. Flagstaff Police say at least ten vehicles were involved in the accident, with no injuries. The accident happened when a vehicle on a transport vehicle ended up in the median. Several semi-trucks were involved in the accident, which was one of many accidents along I-40 after the highway reopened earlier in the day. The highway was closed overnight due to winter weather conditions. I-40 eastbound was still closed as of 2 p.m.