A female suspected member of the outlawed Kurdistan Workers' Party (PKK) was killed Friday in Istanbul in a police operation against militants suspected to be planning suicide attacks, reports said.

Counter-terrorism police raided a home in Istanbul's Sancaktepe district after receiving a tip-off that PKK militants had arrived in Turkey's biggest city to carry out suicide attacks, Dogan news agency said.

The foreign ministers of Turkey and Russia met in Belgrade on Thursday in the first high-level bilateral talks since the downing of a Russian warplane by Turkish jets sparked an unprecedented crisis. 

The meeting between Russia's Sergei Lavrov and Turkey's Mevlut Cavusoglu was held on the sidelines of the ministerial council of the Organization for Security and Cooperation in Europe.

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.

Russia and Turkey, at loggerheads since Ankara shot down a Russian warplane last week, have suspended talks on their joint TurkStream project to pipe gas to Turkey and southern Europe, Russia's energy minister said Thursday.

"Currently talks are suspended," Energy Minister Alexander Novak said, quoted by RIA Novosti state news agency.

Russian President Vladimir Putin on Thursday vowed Turkey's leadership would be made to regret the downing of one of Russia's warplanes as Moscow announced a halt to talks on a major gas pipeline project.

As Putin fired another salvo in his mounting war of words with NATO member Turkey his Turkish counterpart Recep Tayyip Erdogan declared he had "proof" that Russia was involved in illegal oil trading with the Islamic State (IS) group in Syria.

Russia's Foreign Minister Sergei Lavrov said Wednesday he was willing to meet his Turkish counterpart this week for the two countries' first high-level face-to-face talks since Ankara shot down one of Moscow's warplanes.

Lavrov said Turkish Foreign Minister Mevlut Cavusoglu was "insisting" on holding talks on the sidelines of the OSCE Ministerial Council in Belgrade on Thursday and Friday.

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.

NATO chief Jens Stoltenberg said Tuesday the alliance was working on new support measures for Turkey, but insisted the commitment predated Ankara's shooting down of a Russian jet on the Syrian border.

Speaking as foreign ministers from the 28 NATO nations gathered in Brussels, Stoltenberg also reiterated his call for Turkey and Russia to calm the crisis and to find ways to ensure there is no repeat.

A Turkish court on Tuesday threw out an appeal against the detention of two editors from a top daily newspaper as a global media rights watchdog launched a major petition for their release.

The higher Istanbul court rejected the appeal from lawyers for the Cumhuriyet daily's editor-in-chief Can Dundar and its Ankara bureau chief Erdem Gul who had been arrested on "spying" charges last week, the Dogan news agency reported.

U.S. President Barack Obama called on Russia and Turkey to move beyond a furious row over the downing of a fighter jet and focus on the Islamic State jihadist group, after meeting his Turkish counterpart in Paris on Tuesday.

Relations between Moscow and Ankara have plummeted in the past week after Turkey downed a Russian fighter jet along the Syrian border.