Turkish security forces killed 3,100 Kurdish militants in 2015, President Recep Tayyip Erdogan said Thursday, vowing no let-up in a relentless offensive to oust rebels from towns and mountains in the southeast.

His remarks, which were part of a televised New Year's address, come as alarm grows over the humanitarian impact of curfews in the southeast to back up the latest military campaign against the outlawed Kurdistan Workers Party (PKK) that began earlier this month.

Turkish President Recep Tayyip Erdogan on Tuesday accused the leader of the main Kurdish party Selahattin Demirtas of "treason" over his call for autonomy for the country's Kurdish minority.

In a speech at the weekend, Peoples' Democratic Party (HDP) co-chairman Demirtas said that Turkey's largest ethnic minority had to decide whether to live in autonomy or "under one man's tyranny".

President Recep Tayyip Erdogan has said Turkish troops deployed in Iraq for training purposes in the fight against the Islamic State were not on combat mission and their pullout was "out of the question."

The deployment of several hundred troops by Turkey in Bashiqa, close to an area held by IS in northern Iraq, has enraged Baghdad which has asked Ankara to withdraw all its forces.

Recep Tayyip Erdogan and Vladimir Putin, leaders with remarkable similarities who built a new era of cooperation between Turkey and Russia, have suffered a ferocious falling-out that will harm relations for years to come.

The two presidents, who forged a strong friendship in over a decade in power, have traded a slew of insults since Turkey shot down a Russian warplane on November 24 on the Syrian border for alleged repeated violations of its airspace.

President Recep Tayyip Erdogan on Thursday said Turkey had proof Russia was involved in illegal oil trade with the Islamic State (IS) group in Syria, countering "immoral" Russian allegations that his own family was importing oil from the jihadists.

"We have the proof in our hands. We will reveal it to the world," Erdogan said in a televised address in Ankara.

President Recep Tayyip Erdogan on Wednesday vowed Turkey would not retaliate against Russia's "emotional" sanctions imposed after the disputed downing of a Russian war plane.

Russia has halted the sale of tours to Turkey -- a key tourist destination -- and is set to ban the import of Turkish fruit and vegetables as well as threatening other measures.

President Recep Tayyip Erdogan denied Thursday that Turkey bought any oil from the Islamic State group, insisting his country's fight against the jihadists was "undisputed".

"Shame on you. Those who claim we buy oil from Daesh (IS) are obliged to prove it. If not, you are a slanderer," Erdogan said, lashing out at Russian charges after the downing of a warplane on the Syrian border.

Turkey's Prime Minister Ahmet Davutoglu on Tuesday unveiled a new cabinet stacked with loyal allies of President Recep Tayyip Erdogan, including the strongman's own son-in-law as energy minister.

The announcement came on the same day Turkish fighter jets shot down a Russian war plane on the Syrian border, creating a new security challenge for the government. 

Turkish President Recep Tayyip Erdogan on Wednesday called on world leaders to rally behind Turkey's plan for a safe zone inside Syrian territory, days before it hosts the G20 summit.

Speaking to a group of businessmen in the capital Ankara, Erdogan said the Syrian conflict would be a "major topic" at the G20 summit in the Mediterranean resort of Antalya on Sunday and Monday.

Turkey on Tuesday rejected as "unfair" a European Union report criticizing the state of the rule of law, human rights and media freedom in the EU candidate country.

Some of the report's observations are "unfair and even partly disproportionate, and ignore the freedom-security balance required in a democratic country governed by the rule of law", the ministry responsible for EU affairs said in a statement.