The Baltimore's Suns police beat reporter Justin Fenton writes today that home invasion robberies are on the rise in Baltimore. There are some great details in the story, including one robbery who wore a skull cap with "superman" written on the side and another who told his victims to "have a nice day" as he left:

Residential robberies were up 34 percent through April 3, compared with same period a year ago. It's the only category of crime on the rise. Homicides, rapes and overall robberies are down by double-digit percentages, according to police.

Police say they can't pinpoint any driving force behind the uptick, and they aren't ready to blame a still-struggling economy or drug activity. The increase is being felt across the city, but most heavily in Northwest Baltimore, which has notched 21 residential robberies compared with eight at this time last year.

Northeast Baltimore has seen the second highest-total, with 19, and the Southern District's total has doubled, to 14 from seven. Unlike a burglary, a residential robbery requires the presence of a victim in the home or business and the taking of property through force or fear. A burglary, also referred to as breaking and entering, does not involve an encounter with the owner and might not even entail theft.