UPDATE AT 4 p.m. (WZZM) -- Grand Rapids Police Tuesday released a composite sketch of one of the suspects in a west-side sexual assault.

Detectives say the sketch is of "Suspect #1," who is described as a 14 to 15 year-old boy with "Asian features," 5'3" to 5'4" with a "pudgy" build and shorter black hair.  He was last seen wearing a black shirt -- possibly a t-shirt -- and medium color jeans.

The second suspect is described as 13 to 15 years old and possibly Hispanis with a "skinny" build.  He was last seen wearing a light colored shirt and was riding a BMX-style bike.

GRAND RAPIDS (WZZM) - Grand Rapids Police are looking for two teenagers who are believed to have assaulted a woman Monday night.

A woman says she was sexually assaulted about 9:30 pm Monday near Valley Avenue NW and Fulton Street.

Police are looking for two young teenage suspects.

If you have any information, you are asked to call Grand Rapids Police or Silent Observer at (616) 774-2345.