An off-duty Maryland state trooper was arrested following a DUI crash Monday that injured a New Jersey woman and a 10-year-old girl, authorities said.

Trooper First Class Tanner Nickerson was driving a marked Maryland State Police Chevrolet Tahoe north on North Bohemia Avenue in Cecilton, Md. around 9 p.m. when he rear-ended a Mercedes traveling in the same direction, Maryland State Police said in a statement.

The emergency lights in the State Police vehicle were turned on at the time of the collision even though the trooper was neither on duty nor responding to a call, according to officials.

A 49-year-old Cherry Hill woman and the girl in the Mercedes were taken to a local hospital to be treated for minor injuries, officials said.

Nickerson was charged with driving under the influence, driving while impaired, failure to control speed to avoid a collision, reckless driving and negligent driving. The six-year veteran was also suspended with pay, according to Maryland State Police. Nickerson was not hurt in the crash.

Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman. Find NJ.com on Facebook.