The Kleberg County Sheriff's Office is investigating suspicious circumstances surrounding a rumored hit list that was found at Riviera High School Thursday.

Investigators are being very tight-lipped for the moment. As of Thursday night, it was not clear how many names were on the rumored list, but investigators did say that it caused enough concern to warrant an investigation.

Administrators at Riviera High School said safety is of the utmost importance.

"This was a rumor. We take any word of any safety concerns seriously, so it was a safety concern," said Cindy Pelagio, principal of Riviera High School. "So we began an investigation immediately."