GRANDVILLE, Mich.-- A series of crashes on eastbound I-196 slowed traffic Wednesday morning.

The crashes happened around 9:20 a.m. between Chicago Drive and 44th Street. Dispatchers say the most serious one involved an SUV that ended up in a tree. According to police scanner traffic, at least one person in that vehicle had serious injuries to their head.

It's unclear what caused the wrecks. Authorities kept the highway open during the investigation and clean up process.