Denver Police Department plans to increase its enforcement on the 16th Street Mall after receiving reports of aggressive panhandling by groups known as “urban travelers.”

The increased enforcement comes as the police department and Downtown Denver Partnership prepare to roll out a new security plan that includes the hiring of a security manager, said Tami Door, the downtown partnership’s president.

Concerns about aggressive panhandling and mall security increased after Fox 31 Denver broadcast a video of panhandlers harassing and assaulting a downtown office worker. Officials said the incident is concerning.

Despite reports of aggressive panhandling, arrests on the 16th Street Mall have dropped this year. Between January and June 14, 522 people were arrested on the mall, a 7.6 percent decline for the same period in 2015, according to Denver police statistics.

Denver police statistics show 52 adults have been charged with panhandling between January 2015 and June 14. Of those, just over half were charged with aggressive panhandling.

But that’s a small percentage of the overall number of adults arrested on the mall. During that period, 1,729 arrests were made for everything from smoking marijuana, shoplifting and people picked up on warrants from other counties.

Denver police spokesman Sonny Jackson described the aggressive panhandlers as “urban travelers,” young, homeless people who travel to different urban areas around the country.

The Downtown Denver Partnership has been working on its new security plan for about six months. It was not driven by any particular crime trend but arose from an overall concern about the quality of life in the heart of Denver, Jackson said.

The security plan doesn’t involve just adding more uniforms and badges on downtown streets, Door said. It will include plans for things such as better lighting and tips on what businesses can do to help themselves.

It has been hard to pinpoint trends on the mall, Door said. It’s a fluid place and it changes, depending on the season, time of day and what events are happening downtown. For example, this weekend will bring the mall’s first Meet in the Street of the summer where the shuttle buses are moved off 16th Street and entertainment takes over. That will bring a different weekend daytime crowd, she said.

A look at the top 10 reasons adults were arrested on Denver’s 16th Street Mall from January 2015 to June 14, 2016:

Shoplifting: 298

Warrants: 225

Marijuana-related: 200

Trespassing: 195

Public consumption of alcohol: 117

Assault: 79

Disturbing the peace: 59

Petty theft: 53

Panhandling: 52

Threats to people or property: 39

Source: Denver Police Department