CLIMATE activists glued themselves to the ground at Cologne-Bonn Airport in western Germany today, forcing the suspension of flights, authorities said.

Police said that five people glued themselves to a taxiway at the airport, German news agency dpa reported. The protesters were soon removed. 

The Last Generation activist group said in a statement that supporters in several small groups cut through the perimeter fence, approached the airport and then glued themselves to the asphalt with a mixture of sand and glue.

The group is demanding that the German government negotiate and sign an international agreement on a global exit from the use of oil, gas and coal by 2030.

It was the latest of several airport protests by climate activists in recent years that caused disruption to flights.

Last week, the German cabinet approved legislation that would impose tougher penalties on people who break through airport perimeters.

The Bill, which is still under consideration by lawmakers, foresees punishment ranging up to a two-year prison sentence for people who intentionally intrude on airside areas of airports such as taxiways or runways, endanger civil aviation, or enable someone else to. 

So far, such intrusions can only draw a fine but under the proposed new law a sentence of up to five years would be possible in some cases.