Russian Sukhoi Su-24 shootdown

Alparslan Çelik, who Russia has alleged killed pilot Oleg Peshkov of the Russian jet downed by Turkey on Nov. 24, 2015, was arrested on April 3.

A court in the Aegean province of ?zmir ruled for the arrest of Çelik for violating a gun law along with another six suspects.

Meanwhile, the court also ruled for the release of eight suspects.

Alparslan Çelik, who Russia has alleged killed Oleg Peshkov, the pilot of the Russian jet downed by Turkey on Nov. 24, 2015, was detained in the Aegean province of ?zmir on fraud charges, according to police sources. 

Alparslan Çelik, the alleged killer of Oleg Peshkov, the pilot of the Russian jet downed by Turkey on Nov. 24, 2015, according to Moscow, was detained in the Aegean province of ?zmir on March 30. 

Four months after Russian President Vladimir Putin accused Ankara of a "stab in the back," Turkish business executives in Russia are getting used to saying hasty goodbyes.

"Every week another friend calls to say he's leaving," one Turkish businessman based in Moscow told Reuters. 

"It's become very difficult for Turks to do business here."

Russian military airplanes that were taking part in the five-month air campaign in Syria on Tuesday started to leave the Khmeimim base

The first group of planes has departed the base, Russian Defense Minister Sergei Shoigu confirmed.

Russian Ambassador to Turkey Andrei Karlov has said the alleged killer of a Russian pilot whose plane was shot down by Turkey late last year was "roaming free" in Turkey, reiterating the Russian call on authorities to take action over his arrest.

Until Jan. 29, elementary military technology described a Russian Su-24 aircraft as a supersonic, all-weather bomber developed in the Soviet Union, and a Su-34 as a jet designed for tactical deployment against ground and naval targets on solo and group missions with counter-fire and electronic warfare counter-measures.

The Russian presidency has denied the reported violation of Turkish airspace by a Russian warplane on Jan. 29, in line with the country's defense ministry's refutation immediately following a statement by Turkey's Foreign Ministry on Jan. 30 that an airspace violation had occurred.

Turkey "could hit the Russian agricultural sector harder" than Russia's sanctions have hit Turkey by canceling wheat imports from its northern neighbor but has chosen not to, Agriculture Minister Faruk Çelik said in a televised interview on Jan. 31.

Turkish Foreign Minister Mevlüt Çavu?o?lu has said Russia will "face the consequences" if it continues to violate Turkey's airspace, two days after Ankara declared that Russia had again violated its airspace despite multiple warnings.