KALAMAZOO, MI -- Kalamazoo-area law enforcement organizations arrested 20 people connected to "X-Trains," informal groups of vehicles that roam streets on the north side through the late hours of the night.

On Saturday, Kalamazoo Public Safety officers, deputies from the county sheriff's office and Michigan State Police troopers teamed up to address neighborhood concerns of continued disruption that follows the vehicles. According to a KDPS release, officers arrested 20 people on a total of 22 criminal charges, including possession with intent to deliver heroin, possession of cocaine, fleeing and eluding, operating while intoxicated, resisting and obstructing arrest, and multiple misdemeanor traffic offenses.

In addition to the criminal charges, seven warrant arrests were made. As a result of the arrests, 10 vehicles were towed and impounded.

Named for its association with the drug ecstasy, the X-Train is essentially a pop-up caravan of up to 100 cars that has disturbed residents on the north side of Kalamazoo for years.

At a Monday, March 6 City Commission meeting, Douglas Neighborhood Association representatives demanded police put an end to the mobile parties.

At the time, Kalamazoo Department of Public Safety Chief Jeff Hadley said the pop-up caravans are difficult to anticipate and respond to, but will send officers if the neighborhood seeks additional enforcement.

Twenty-three people were arrested in a similar operation after Kalamazoo resident Tiffany Ayers, 39, was shot and killed near the corner of Florence Street and North Westnedge in 2011.

In the release, KDPS announced it will be "continuing strict enforcement in order to address neighborhood concerns regarding this type of activity."

"Through this enforcement, it is our hope to deter this type of activity that adversely impacts the quality of life for area residents," Police said in a release. "Kalamazoo Public Safety appreciates the continued support and patience of those affected by this type of disruption."

Anyone who may have information regarding this investigation is asked to call Kalamazoo Public Safety at (269) 337-8994 or Silent Observer at (269) 343-2100 or www.kalamazoosilentobserver.com.