MADISON, Wis. -

A 13-year-old said a stranger grabbed him and tried to drag him toward a railroad car before he was able to escape, according to a report from Madison police.

The incident happened around 5 p.m. Saturday in the 800 block of Troy Drive.

According to police, the boy, who was visiting from Minnesota, said the man who grabbed him was wearing a mask at the time.

Police said the boy yelled for help. Another boy, a 14-year-old from Madison, came to help him, throwing rocks at the man, which allowed the victim to escape.

The boy described the attacker as a white man, 5 feet 6 to 5 feet 10 inches tall, with a slender build, short brown hair, wearing black clothing and a mask. Anyone knowing anything about the incident is asked to call Madison police.