By Diyar Guldogan
ANKARA (AA) - The purchase of the S-400 missile defense system from Russia will be finalized "this week", Turkish President Recep Tayyip Erdogan said Monday.
"Our colleagues will come together this week to conclude this work," Erdogan told a news conference with Russian President Vladimir Putin in Ankara.
Erdogan added that cooperation between Ankara and Moscow was getting stronger "day by day".
"Our bilateral trade volume with Russia increased 30 percents as of the first 10 months of 2017," he said.