In a statement posted to its website, the Boston Athletics Authority said bags larger than a fanny pack are banned from the race area. The BAA will provide clear plastic bags for official participants to store equipment at a gear check area about half-a-mile from finish area.
On April 16 last year, two bombs exploded within seconds of each other, killing three and injuring 264 others.
Federal prosecutors said last month they will seek the death penalty for Dzhokhar Tsarnaev, one of the suspects in the Boston Marathon bombing. His brother and alleged accomplice Tamerlan died during a police shootout following the search for suspects.