There is a possibility that Turkish ministers could plan another rally in Germany ahead of an April 16 referendum on changing the constitution, President Tayyip Erdogan’s spokesman said on Sunday, a move that could further heighten tension with Berlin.

Turkey has been locked in a feud with both Germany and the Netherlands after both countries prevented its ministers from addressing rallies of expatriate Turks, citing safety concerns.

Erdogan spokesman Ibrahim Kalin made the comment in an interview with broadcaster CNN Turk. Kalin said that “Turkophobia” was on the rise in Europe, as Ankara points out the West’s mistakes, adding that Turkey remains a country friendly to international investors.