CHERRY HILL, Nj (CBS) — New Jersey State Police arrested and charged two young men with obstruction and underage drinking after being caught throwing beer cans out of their car along Route I-295 on Sunday night.

State police say calls came in around 7 p.m. about an erratic driver —  and by the time troopers responded — the vehicle had crashed into the guardrail at mile marker 32 in Cherry Hill.

An off-duty trooper saw the accident and responded.

According to state police, the two men in the car — one 19-year-old and one 20-year old — attempted to flee the scene, and say the off-duty trooper had to point his gun to keep them from getting away before on-duty troopers arrived moments later.

The men were processed at the Bellmawr barracks.

State police say the 20-year-old, unlicensed driver was also charged with DWI. Both were released.

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