Police arrested a man at a troubled downtown Honolulu apartment building after he allegedly threatened two security guards with a knife — bad news for a property already under heavy scrutiny.

• A man pointed a knife at two private security officers from an open second-story window and threatened to kill them.
• Police arrested him at the Union Mall apartment complex and booked him for first-degree terroristic threatening.
• The Bishop Street building has seen rising friction between tenants, the owner, and city authorities.
• Private security was already on site, a sign the building's problems were serious before this arrest.

Outlook: Expect more pressure on the building's owner and more police attention at the property in the coming weeks.