Passengers wait at the airport in Hanover on December 29, 2018 after a security incident resuled in flight operations been suspended when a man broke through a gate with a vehicle before being stopped by Police.
Police have said there is no indication of a terror motive.
German news agency dpa reported that federal police said the man, who was in a Polish-registered vehicle, was detained on Saturday afternoon.
A Hanover police spokesperson told DW that the man in his mid-20s drove out onto the runway and followed a plane from Greece's Aegean Airlines after it had landed.
No one was hurt, Hannover police said. The auto was searched and no unsafe items were found. The auto was stopped by federal police and the driver was detained.
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Two German tourists were stabbed to death at a hotel in the popular Red Sea resort of Hurghada previous year . A bomb hidden beside a wall went off as the bus carrying 14 Vietnamese tourists was passing.
The man was believed to have acted alone.
The lockdown will reportedly last till at least 9pm local time, meaning that the ninth busiest airport in Germany will be out of operation for over five hours.
The driver could have been on drugs as the incident unfolded, NDR said, adding that the quick on-site drug test was "positive".
They couldn't give further information about where he came from because he was not carrying an identity card. Flight operations are now suspended. During the incident, Eurocontrol said that the airport would be closed to takeoffs and landings until 8 pm.
Hannover, the ninth largest airport in Germany, is the main global airport of the country's Hannover and Lower Saxony region, according to its website.