Washington:
In a shocking case, three US teenagers have been charged with a 90-year-old woman's rape in Detroit city, a media report said.
Police said that the trio carried out the brutal rape on the woman after forcing their way into her home on August 12, the report said.
The attack angered residents who started patrolling their neighborhood with bullhorns urging witnesses to come forward.
Police say more than 200 volunteers played a key role in helping solve the case.
"I just wonder what type of world we're coming to -- teenagers committing heartless acts. Detroit has a bad mark right now in America but us coming together to catch these three guys it shows we can do a lot more in our community," said one volunteer.