CLEVELAND, Ohio (NewsNation Now) — Authorities in Ohio have recovered 35 missing Ohio children as part of a joint law enforcement operation.

The missing and endangered children were between the ages of 13 and 18, and just over 20% of them were tied to human trafficking, according to U.S. Marshals.

The United States Marshal for the Northern District of Ohio has created a permanent Missing Child Unit based on the results of Operation Safety Net, an effort that included local and federal law enforcement, the press release states.

The missing children were recovered in Cleveland, Euclid, Akron, Mansfield, Columbus, and Miami, Florida.

“This was new unchartered territory and the first time we conducted an operation like this,” said U.S. Marshal Pete Elliott. “I am very proud of our law enforcement, community and media partners who worked tirelessly to bring our missing and most vulnerable children to safety. The establishment of a permanent unit in Northern Ohio will ensure that our most vulnerable missing children will continue to be found and brought to safety.”

The Marshals Task Force said of the 40 missing cases referred to them, only five remain open.

“Members of the task force and its local partners will continue to work over the next several weeks to bring these 5 remaining children and other children to safety,” according to a news release.

The children who remain missing are pictured below:

Those with information on the five remaining missing children are urged to contact U.S. Marshals at 1-866-492-6833.