WICHITA, Kan. (AP) — Wichita police say they’re dealing with a dramatic increase in armed robberies of businesses.

The Wichita Eagle reports that police say that through late last week there had been 102 armed robberies of businesses so far this year. That’s up 33 percent over the same time last year and nearly 50 percent over 2013.

Sgt. Stephen Patton, who heads the robbery section of the Wichita Police Department, says the robberies are also more aggressive and dangerous.

Patton says he doesn’t know the reason for the increase, and the largest increases came in the spring and summer.