CHARLTON, Mass. » Police in a central Massachusetts town are warning residents to be on the lookout for men challenging passersby 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 at about 3 p.m. Saturday.

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 that it did frighten the teens.

Anyone with information is asked to contact police.

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