A note discovered with the children stated that they are siblings from Honduras.

USBP agents rescue children abandoned in Rio Grande
Credit: Chief Patrol Agent Del Rio Texas/Twitter

U.S. Customs and Border Protection (CBP) rescued two young siblings after they were discovered alone in the Rio Grande riverbank.

On Tuesday, CBP posted a photo on Twitter of a 2-year-old girl with a backpack and a 3-month-old baby boy in a safety carrier with a blanket sitting near an array of branches and trees.

The agency revealed in a news release that responders found the children abandoned near Eagle Pass around noon. Officials doing boat operations "noticed an unusual color on the riverbank" and upon investigation, discovered the children.

"Agents quickly responded and safely retrieved both children," the press release states. "The children did not require medical attention and were transported to the Uvalde Station for processing."

A note found under the infant's carrier seat revealed the children's ages and confirmed that the young children are siblings from Honduras, CBP shared.

"A thorough search of the area was conducted and no additional individuals were encountered," the agency said in the release.

In an additional statement shared on Twitter, CBP Del Rio Chief Robert Garcia commended his workers for bringing the children to safety.

"The attention to detail our agents demonstrate while preforming [sic] their duties can be the difference between life and death," he wrote

Garcia added, "It is heartbreaking and frustrating to know that there are children being abandoned without remorse or concern for their lives and wellbeing."

The whereabouts of the parents are uncertain at this time.

This story originally appeared on people.com