The trooper, who was not named, was working an overtime assignment at the reception desk when the 44-year-old gunman walked in, approached the trooper and fired, state police said at a news conference Tuesday night.

After a gunman shot a Delaware state trooper inside a DMV office, the wounded trooper pushed a nearby employee to safety before the gunman shot him again, killing him, authorities said.

Authorities in Delaware say a state trooper has been killed along with the suspected gunman during a shooting at a motor vehicle agency near Wilmington.