"The West arms all terrorists in the Middle East. Although the West still denies this fact, Ankara has documentary evidence of arms deliveries. There also are photos on which terrorists are wearing uniforms of these countries," Erdogan said, as quoted by the Anadolu news agency.
The incident with the ministers prompted Turkish protests near the Rotterdam consulate. Turkish Prime Minister Binali Yildirim threatened "harsh" retaliation measures, while Erdogan had promised to retaliate for the incident with the foreign minister.
Ankara has been seeking support from Turkish expats for a constitutional change that would increase the president's powers. The Turkish referendum on the constitutional amendment is scheduled for April 16.