ATLANTA (AP) — Authorities say they're trying to determine what caused the engine problems that prompted a small plane to make an emergency landing on a busy stretch of Interstate 85 northeast of Atlanta.

The plane landed smoothly and without hitting any cars on a southbound stretch of the interstate Monday afternoon a few miles from Peachtree DeKalb Airport.

Television shots showed traffic snarled for miles as the Piper Saratoga blocked at least four lanes around 5 p.m. as the city's evening rush hour was beginning. It was hauled away a few hours later.

Federal Aviation Administration spokeswoman Kathleen Bergen says no injuries were reported.

The pilot, identified as Matt Conway by WSB–TV, told the station mechanical problems forced him to land.

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