(CNN) An accident involving more than two dozen vehicles shut down part of Interstate 95 on Tuesday in Carmel, the Maine State Police said.

Hundreds of motorists were stranded behind the crash for about four hours, as the northbound lanes of I-95 were closed until shortly before noon, according to CNN affiliate WABI

The early stages of the investigation indicate "blinding sun" may have caused the initial accident around 7:45 a.m., causing a "chain reaction crash" involving about 30 vehicles, police said.

The crash occurred near mile marker 174, and traffic was diverted at exit 157 in Newport, police said. Carmel is located about 15 miles west of Bangor.

The Tuesday morning wreck on Interstate 95 North involved about 30 vehicles, police say.

There were injuries, police say, but it wasn't immediately clear how many people were hurt or how badly.

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