Russia is preparing wide-ranging economic sanctions against Turkey over the downing of one of its jets on the Turkey-Syria border.
Prime Minister Dmitry Medvedev said the measures could including halting joint investment projects.
He said he hoped to get the sanctions drafted within the next two days.
Turkey has released what it says are recordings of warnings to the Russian SU-24 aircraft against violating its air space.
Moscow says the plane was brought down without warning while conducting a bombing raid over Syria.
