Harris County, Texas, Sheriff Ed Gonzalez confirmed that they've located a missing van days after it was swept away by Harvey's flooding, and all six missing passengers were found dead inside.

According to KTRK-TV, Sammy Saldivar attempted to drive his parents and four children away from the flooding when the van was caught in rushing floodwaters Sunday on Greens Bayou. Saldivar was rescued, but the other six passengers were missing, the report added.

The victims were identified as 84-year-old Manuel Saldivar and his wife, Belia, 81, and great-grandchildren Devy, 16; Dominic, 15; Xavier, 8 and Daisy, 6.

"We have a total of six confirmed dead," Gonzalez told reporters. "Our worst fears have been realized."

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Family member Andrew Saldivar told the Houston Chronicle that he found the van Tuesday night after floodwaters began to recede. He also said he discovered the grandparents' bodies inside the vehicle.

Later Wednesday, officials confirmed the deaths of the four children.

"He's still blaming himself ," relative Ric Saldivar told CNN, speaking about Sammy. "He was trying to do the right thing to get them out of the flood ... and it just happened."