A package with a suspicious device intended to board a cargo plane of the international courier company DHL, caught fire at the company's logistics center in Leipzig.

Thomas Heldenwang, the head of German domestic intelligence, said there was a significant increase in attempts by Russian agents in Germany. 

In another case, Britain's counter-terrorism unit is investigating whether Russia is behind a fire at a DHL warehouse in Birmingham after a suspicious device was planted in one of the pieces of luggage carried on the plane.