Protesting German farmers set fire to tyres and dumped liquid manure on the road during a protest in the central German city of Magdeburg in the early hours of Thursday. The protest came amid an escalation of weeks-long demonstrations against cuts to fuel subsidies. Police in the Bavarian region of Lower Franconia, meanwhile, launched a criminal probe into dumped hale bales, heaps of manure and burning tyres that blocked entrances to motorways early on Thursday morning. Authorities suspect angry farmers are responsible and are investigating on suspicion of dangerous interference with road traf…