NEW : 2 possible suspects are in custody , a local police sergeant says . NEW : There was a loud noise after a bomb threat was made , according to police . An assistant principal suffers smoke inhalation and is taken to hospital . It appears to be a prank , a police spokeswoman says .
NEW : 2 possible suspects are in custody , a Memphis police sergeant says . NEW : There was a loud noise after a bomb threat was made , according to police . An assistant principal suffers smoke inhalation and is taken to hospital . It appears to be a prank , a school spokeswoman says .