An unidentified man was seen shoveling the snow from the Boston Marathon’s finish line, where three were left dead and over 260 were injured in 2013.

In a powerful photo that has since gone viral, a lone man is seen clearing the snow from the finish line on Boylston Street in Boston, Mass.

Phillip Hillman was at the CharlesMark Hotel and happened to witness it, taking a photo and starting the hashtag #whoshoveledthefinishline on Twitter, CBS Sports reports.

Since the photo went viral, a search is underway for the man who completed this moving act. The Boston Police Dept. has since tweeted, “Help Boston solve a #BlizzardOf2015 mystery. #WhoShoveledTheFinishLine? #BostonStrong.”

For his part, Hillman is shocked about the response the photo got. He told Runners World, “I had no idea it would have this response.”

He though the man might be an employee of the CharlesMark, but a rep for the hotel told Mashable it wasn’t.

Ironically, the blizzard has postponed the jury selection in alleged Boston bomber Dzhokhar Tsarnaev’s trial.

image via Twitter from Phillip Hillman

image via Twitter from Boston Police Dept.