DINWIDDIE, Va. (AP) - Gov. Bob McDonnell says a trooper involved in a shooting along Interstate 85 in Dinwiddie County has died.

McDonnell says 40-year state police veteran Master Trooper Junius Walker was shot while on duty on Thursday.

Virginia State Police spokeswoman Corinne Geller says Walker was shot multiple times around 1:30 p.m. He called for backup, and a trooper who arrived within two minutes saw a male suspect shooting into Walker's car. The second trooper fired at the suspect, who fled into the woods on foot.

The suspect was arrested before 2 p.m. Charges are pending.

Geller says authorities are working to determine if another suspect was involved in the shooting, near the 45-mile marker.

A portion of the interstate remains closed while police investigate.

Read Governor Bob McDonnell's full statement on the tragedy:

"Virginia's public safety professionals are on the front lines every day protecting their fellow citizens from harm and pursuing those individuals whose actions put others in danger. These men and women are heroes who place their lives on the line to protect their fellow Virginians. Today, Virginia lost one of its heroes. Our hearts go out to the family, friends, and Department of State Police, as we mourn the loss of Master Trooper Walker who was killed in the line of duty today after 40 years of service.

"Sadly, since I have been governor, I have spoken with the families of our fallen law enforcement officers far too often. Each time we lose another officer, I am reminded of the sacrifice that our law enforcement professionals and their loved ones make each and every day. There are no words from me or anyone else that can take away the pain these families feel when they are notified that their husband, wife, child, mother, father, brother or sister will not return home from their shift. On behalf of all 8 million of the citizens of the Commonwealth, I offer our heartfelt condolences and gratitude for the sacrifices these families have made to keep us all safe. Today, I offer such condolences to Master Trooper Walker's wife Betty, his two daughters Vera and Clarissa, and the rest of his family, friends, and colleagues. Our prayers are with them during this difficult time. Virginia has lost a brave public servant and hero."

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