Authorities say a southern New Jersey police officer seriously injured in a weekend crash that killed a colleague has undergone successful surgery and continues to  improve.

Millville Police Car
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Millville officer Jonathan Seidel was listed in good condition Tuesday, one day after doctors repaired injuries to his left arm.

But it's not known how long he will remain hospitalized. Seidel had joined the force last month and was riding with officer Christopher Reeves as part of a field training program when the crash occurred early Sunday. Authorities say 23-year-old Timothy Seidel II of Commercial Township, who is not related to the injured officer, was fleeing from police when his car crashed into the officers' cruiser.

Reeves was killed in the accident, while Timothy Seidel remains hospitalized in critical condition.

(Copyright 2012 by The Associated Press. All Rights Reserved.)

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