The Turkish lira and stocks plunged Monday as officials tried to stem the carnage caused by President Recep Tayyip Erdogan's abrupt dismissal of his reformist central bank chief.

A crackdown on unregistered migrants in Istanbul has seen 6,000 arrests including Syrians in the past two weeks, the interior minister said Wednesday.

A defiant President Recep Tayyip Erdogan on Sunday vowed to fight terror "to the end" as a Kurdish militant group claimed twin attacks that ripped through Istanbul, killing 38 people, mostly police.

The bloodshed, which took place late on Saturday, saw a car bomb exploding outside the home stadium of football giants Besiktas and less than a minute later, a suicide attacker blew himself up by a group of police at a nearby park.

Seventeen people including 11 Russians have been charged over the Istanbul airport attack, Dogan news agency reported Tuesday, bringing to 30 the total number charged over the suicide assault.

Two suspected Islamic State jihadists have been detained at Istanbul's Ataturk airport days after it was hit by suicide bombers, as Turkish authorities move to boost security at sensitive sites.

A Turkish court on Sunday charged ten people over the suicide bombing in the heart of Istanbul's tourist district that killed 10 Germans, media reported.

The ten, who were charged with belonging to a terrorist organization, were remanded in custody, the Dogan news agency said.

Turkey has arrested a total of seven suspects over a suicide bombing blamed on the Islamic State (IS) group that killed 10 German tourists in Istanbul, the Turkish interior minister said Thursday.

"Our operations are continuing. The number of those detained so far has risen to seven," Efkan Ala told Turkish ambassadors gathered in Ankara.

Ten Germans were killed in the suicide bombing that ripped through the historic heart of Istanbul, Germany's foreign ministry said Wednesday.

"I must relay the sad news that we now have 10 dead Germans among the victims" from Tuesday's attack, ministry spokeswoman Sawsan Chebli told reporters.

A mortar attack was the cause of a deadly incident on December 23 at Istanbul's Sabiha Gokcen airport that left one person dead and damaged several planes, Turkish prosecutors said on Thursday.

Four mortar shells were fired from a forested area around two kilometers (1.25 miles) from the airport, prosecutors said in a statement carried by the Anatolia news agency.

The United States consulate in Istanbul was Wednesday offering only limited services with a scaled-down staffing due to information about a possible security threat, the mission said.

"Due to information about a possible security threat against the U.S. Consulate General in Istanbul, the Consulate will open with limited staff and services" on Wednesday, the mission said in a statement.