German police are investigating an election campaign flyer by a far-right party that looks like a plane ticket and calls for the deportation of “illegal immigrants.”

The far-right Alternative for Germany (AfD) party sent "deportation tickets" for "illegal immigrants" to mailboxes around the city of Karlsruhe, a local AfD official confirmed to dpa on Tuesday. Police in the western city have launched an investigation into the campaign stunt on suspicion of incitement to hatred.

Germany has not found any further cases of foot-and-mouth disease, agriculture minister Cem Oezdemir said on Wednesday, adding that experts were working day and night to establish the source of the country's first outbreak of the disease in decades.

Germany’s agriculture ministry said on Wednesday it expects meat and dairy product exports to the European Union to continue despite a case of the foot-and-mouth disease affecting livestock being confirmed last week.