The United Nations on Monday called on Ankara to investigate the suspected shooting of a group of unarmed people in Turkey's southeastern Kurdish-dominated region, caught in "extremely shocking" video footage.

Speaking to reporters in Geneva, U.N. rights chief Zeid Ra'ad al-Hussein voiced outrage at an incident caught on camera in the town of Cizre around 10 days ago.

Turkey on Saturday accused Russia of a new violation of its airspace, warning Moscow against "irresponsible behavior".

"A Su-34 plane belonging to the Russian Federation air force violated Turkish airspace at 11:46 (0946 GMT) local time yesterday (Friday)," the foreign ministry said in a statement.

Turkish President Recep Tayyip Erdogan on Saturday embarks on a major tour of Latin American countries in a bid to expand Ankara's ties outside its traditional sphere of influence.

His visits to Peru and Ecuador are the first-ever by a Turkish president and the stop in Chile is the first since late president Suleyman Demirel traveled there back in 1995.

The Turkish coastguard on Saturday recovered the bodies of women and children washed up on a beach after yet another migrant boat sank while trying to reach Europe, leaving at least 37 dead.

In harrowing scenes reminiscent of the death of Aylan Kurdi, the Syrian toddler photographed lying dead on a Turkish beach in September, the body of a small child could be seen among those strewn over a beach near the town of Ayvacik in northwestern Canakkale province, an AFP photographer at the scene said.

A Turkish citizen fighting in Syria who Moscow has accused of killing a Russian pilot said Friday he was not scared Russian forces are targeting him, after making an unexpected public appearance in Istanbul.

Alparslan Celik has been accused by Russia of killing in cold blood Russian pilot Oleg Peshkov as he parachuted to the ground after his plane was shot down by Turkish air forces on the Syrian border on November 24.

President Recep Erdogan on Thursday called for the Turkish people to vote in a referendum to strengthen his power in a presidential system, saying it was out of the question to take a step backward on the issue.

Erdogan, the strongman of Turkish politics for more than a decade, has long been seeking a new constitution to transform his post into a powerful U.S.-style executive "super-presidency," which he says will provide more effective governance.

An 11th German victim has died of her injuries from a suicide bombing this month in the heart of Istanbul blamed on the Islamic State group, authorities in Berlin told AFP Thursday.

"I can confirm that a woman wounded in the Istanbul attack died Tuesday in a Berlin hospital," a police spokesman in the German capital said.

Three Turkish soldiers were killed Wednesday in clashes with Kurdistan Worker's Party (PKK) militants in Diyarbakir in southeast Turkey, the military said, as a controversial curfew order was expanded to new areas in the Kurdish-dominated city.

Kurdish militants on Wednesday attacked the security forces with rifles and rocket launchers in the central Sur district of Diyarbakir, prompting intense clashes that killed three soldiers and wounded six others, the army said in a statement.

Russia's federal tourism agency on Wednesday issued a warning that Islamic State jihadists were planning to abduct Russian citizens in Turkey.

"According to the competent agencies, leaders of the IS terrorist group plan to take hostages from among Russian citizens in Turkey," it said in a statement.

Turkish prosecutors on Wednesday sought multiple life sentences for two top opposition journalists on charges of revealing state secrets in a report that alleged President Recep Tayyip Erdogan's government tried to send arms into Syria.

Prosecutors asked the Istanbul court to sentence Cumhuriyet newspaper editor-in-chief Can Dundar and Ankara bureau chief Erdem Gul each to a penalty comprising one aggravated life sentence, one ordinary life sentence and 30 years in jail, the Dogan news agency reported.