(WBIR-Lenoir City) Lenoir City Police said officers are trying to track down a thief or thieves who plotted an elaborate scheme, cutting security camera lines and smashing through ceilings and walls to steal thousands of dollars worth of expensive cell phones from a Sprint store.

Sometime between 11 p.m. Thursday and 8 a.m. Friday, someone broke through the front door of Fiesta Brava, in Lenoir Mills shopping center on Highway 321. The owner said his restaurant was just their starting point.

"You can see here where the frame is bent," said Martin Ayala, the restaurant owner. "Then they came back here to the office, you can see the hole, but they didn't get anything so then they came back here to the back room."

Ayala said the employee-only door was unlocked, but the thief smashed a hole anyway, before moving on to cut the phone and cable lines and then ripping the ceiling insulation.

Read more from our news partner WBIR.