Cox was targeted in the attack as she prepared to hold a regular session to give advice to constituents.
The EU is looking to review its broader policy toward Moscow in the second half of the year.
EU targeting Vietnam, Singapore in new business initiative
"We failed to notice that ordinary people, the citizens of Europe, do not share our Euro-enthusiasm."
"Since when are you [EU] running this country? Who has given you the authority?" Erdogan asked.
The proposal would cover multinational companies with revenue of at least 750 million euros
Under the accord, migrants and refugees who cross the Aegean Sea illegally are sent back to Turkey.
Many states too worried about immigration to show much solidarity with those on the front line.