Authorities are investigating two suspicious bags left near the finish line of the Boston Marathon amid stepped-up security on the anniversary of the bombings that shook the city a year ago today.

Police say the man they believe dropped the bags has been detained for questioning. There is no indication that the bags were dangerous.

WATCH: Video Shows Suspicious Person Near Boston Marathon Finish Line

The race takes place April 19, but today was a day of remembrance in Boston, a year after bombings at the finish line killed three and injured 264.

Police said the bags were left in the area of Boylston St. and Exeter St., and the road was closed. Both bags were exploded by Boston Police as a precaution.