The younger half-brother of accused Florida school shooter Nikolas Cruz appears to have broken his silence more than a week after the massacre.

A person identifying himself as Zachary Cruz opened up his Facebook page to the public — posting a new profile photo of two smiling little boys hugging each other and the message “Appreciate all the positive messages” with heart emojis — late Saturday.

If it is Zachary’s page, it would be the first time he has been heard from since the Feb. 14 shooting. He was involuntarily committed for mental observation Feb. 16.

The message was the only posting visible on the page Sunday afternoon. It garnered several responses from well-wishers.

“Praying for you and Nik,” wrote Arahely Velazquez.

“Praying for you, your brother, and your community. Love and support from SC,” commented Amber Morris.

No one responded to any of the roughly 20 comments that the post received as of Sunday afternoon.

Most of the friends on the account are South Florida high schoolers — including many from Marjory Stoneman Douglas High School, where Nikolas allegedly killed 17 former classmates and teachers.

No local teenagers appear to have responded to the post.

Zachary did not respond to a message seeking comment.

Zachary, 16, and Nikolas, 19, were adopted as infants by Lynda and Roger Cruz. Roger died of a heart condition in 2004, and Lynda succumbed to flu-related pneumonia on Nov. 1, 2017, leaving the brothers in the care of her friend Rocxanne Deschamps.

A heart-wrenching photo obtained by The Post showed the boys holding their mother’s urn at her funeral late last year.

A source close to Lynda and Deschamps said it was the caretaker who had Zachary committed.

Deschamps is seeking permission from a court to settle Lynda’s estate, which could be worth up to $1 million. She could not keep the money herself but could charge a fee for doling it out to Lynda’s heirs, legal experts have said.