Four American Airlines flight attendants were injured during turbulence last week, the airline said. American Airlines flight 2905 departed from Tampa at 5:39 p.m. Thursday heading to Charlotte when the Airbus A321 encountered "unexpected turbulence," an American Airlines spokesperson told USA TODAY. Four of the six flight attendants working the flight were taken to a local hospital for further evaluation. No further information on their injuries has been disclosed. None of the 154 passengers were injured from the turbulence and the aircraft landed safely at its destination on-time. "We thank our crew members for their professionalism and our customers for their understanding," the airline said in a statement. This incident is just the latest in a series of turbulence-related events, which is becoming more common, even in the warmer months.<br/>