CHARLTON, Mass. (AP) – Police in a Massachusetts town are warning residents to be on the lookout for men challenging passers-by to rap battles.

Charlton police told WCVB-TV that a black SUV containing a group of men in their late teens or early 20s pulled up next to three teenage boys Saturday afternoon.

One of the men got out of the vehicle and started rapping. The other men then asked the teens if they wanted to “spit some bars” with them. When the boys declined, the men drove off.

Police say it doesn’t appear to be an attempted abduction, but the boys were frightened.

Anyone with information is asked to contact police.

Charlton’s website says it’s one of the 50 safest cities in Massachusetts.