Search efforts ramped up Saturday for Barway Collins, the 10-year-old Crystal boy who has been missing for two and a half weeks.
Two different groups organized search efforts along different sections of the Mississippi River, according to KSTP.
Collins has not been seen since March 18, when a school van dropped him off in front of his apartment building.
Until now police and volunteers have been focusing their efforts in North Mississippi River Regional Park, because Collins often visited that area, and because his father was reportedly seen in that area before the boy was reported missing.
But with Saturday's efforts, the search area has expanded.
The first search began Saturday morning, organized by Minnesota United and Christophers Legacy – groups led by family and friends of Mandy Matula and Christopher Rossing, who both went missing in recent months.
They searched the banks of the Mississippi River near downtown Minneapolis and the University of Minnesota, KARE 11 reports.
They found a blue plaid shirt floating in the river, but police said it doesn't appear to match the shirt that Collins was wearing the day he disappeared. They also found a pair of black pants.
Another group of about 50 volunteers, including family and friends of Collins, conducted another search about 4 p.m. Saturday at Islands of Peace Park in Fridley, which is upstream from the regional park, according to KARE 11.
On Thursday, searchers found a backpack and a shoe they thought may belong to Collins. The items were turned over to Crystal police, who say they will examine any evidence the searchers find to see if it's connected to Collins' disappearance.
Police have described the boy's father as a suspect but he maintains his innocence and has not been arrested.
A $12,000 reward is being offered to anyone with information that could lead to an arrest or prosecution in Barway's disappearance.