Workers returned to 345 Park Ave., on Monday​ under the watchful eyes of NYPD officers and a surplus of security after the NYC mass shooting.

Family, friends, coworkers, religious leaders and more gathered for a prayer service for the Midtown mass shooting victims of last week. FOX 5 NY's Sharon Crowley reports from the Midtown service and speaks with members of the community.

There were 23 shell casings and 13 bullet fragments recovered from the lobby of 345 Park Avenue and 24 spent shell casings on the 33rd floor, police said.