At 5 p.m. today, Baltimore police will slap a padlock on yet another city business -- Club 410 in Northeast Baltimore. The department announced on its Twitter site that a police commander, after hearing hours of testimony at a public hearing last month, has ruled that club should be closed because its owners tolerated criminal activity.

Police Commissioner Frederick H. Bealefeld III agreed. "The commissioner has a zero-tolerance for businesses that condone criminal violations," said his spokesman, Anthony Guglielmi.

It is part of the department's effort to hold business owners accountable for what goes on in and around their establishments. Police have padlocked a liquor store on North Avenue and threatened to close a East Baltimore motel and bar (their owners are working with authorities to come up corrective action).

Police say that Club 410 requires extra patrols to keep violence down. They cited three nonfatal shootings in recent months. A law student acting as the club's attorney noted that most of the violence occurred outside the club, beyond the control, and that they use metal detectors to screen patrons.