Police spokesman David Estrada told the Boston Globe that the backpacks don't appear to be dangerous, but said authorities would take them seriously.
Witness said that a man wearing a black veil and make up had dropped the backpacks, WCVB reported. Others said they saw him acting erratically and heard him screaming "Boston Strong."
Police said that they had one man in custody in relation to the backpacks.
Notable deaths of 2014 [PHOTOS]