A pedestrian has died after being struck by a deputy’s vehicle early Wednesday morning on Route 301 in Waldorf, Maryland, the Charles County Sheriff’s Office says.

It happened around 4 a.m. in the 3600 block of Crain Highway (Route 301), according to tweets from the sheriff’s office.

The on-duty officer attempted to perform first aid on the pedestrian until paramedics arrived, according to law enforcement. But authorities say the person died at the scene.

An investigation is ongoing, police said.

WTOP Traffic reported that a portion of Crain Highway was closed for over five hours. It reopened after 9:30 a.m.

Deputies haven’t publicly identified the pedestrian or offered details about what lead to the crash.

“This is an unfortunate incident on many levels and the accident is being investigated,” said Sheriff Troy Berry in a statement.

Here’s a map of the area where deputies said the crash happened:

[google_map latitude=”38.6146″ longitude=”-76.9223″ zoom=”13″ height=”300px” location_label=”scene of the crash” dynamic_map=”false”]