A substitute teacher pulls out a diabetic student's insulin pump, which regulated his blood sugar levels, after mistaking it for a cell phone.

Cliffton Hassam told East Ridge High School officials his insulin pump began beeping in class. But, before he could turn it off, Hassam says substitute teacher Richard Maline ripped it from his leg.

Lake County School District officials say Maline pulled the pump because he thought the beeping came from a cell phone. They say Maline realized his mistake after he grabbed the pump.

In the written statement, Hassam says the pump fell to the floor and the tube came out of his leg.

School district officials say Maline is now removed from the pool of substitute teachers.