Frankfurt/Lisbon  - Heavy turbulence during a Lufthansa flight from Munich to Lisbon injured 10 people and forced the plane to land in Switzerland.

The Airbus A321 carrying 147 passengers landed for safety reasons in Geneva after the passengers were slightly injured, Lufthansa spokeswoman Claudia Lange said.

Several of them were transferred to a hospital after the pilot decided to land so they could get treatment, she said.

The airline sent a replacement craft from Frankfurt to continue the flight to Portugal and the first plane was to be examined.

Media reports in Portugal said parliamentary president Jaime Gama and other politicians were on the flight. (dpa)