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.

A Turkish woman was killed and her male partner badly wounded in an apparent double suicide bid on Istanbul's best known shopping street, reports said Saturday.

The woman, Zeren Buke Toku, and her partner, Nazif Tugrul Saglam, sat on a pavement on the bustling Istiklal Avenue, where several other young people were out late Saturday, some drinking and others making music, Dogan news agency reported.

A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul Monday.

Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on foot for the northwestern city of Edirne, 250 kilometers (150 miles) away.

More than 100,000 people -- many waving Turkish flags -- attended an "anti-terrorism" rally in Istanbul Sunday, AFP reporters estimated, as President Recep Tayyip Erdogan presses a major offensive against Kurdish rebels. 

The huge crowd thronged Yenikapi Square on the shores of the Marmara Sea for the demonstration, which was to culminate with an address by Erdogan.

Bulgaria began on Thursday deploying up to 1,000 troops to buttress its southeastern border with Turkey as hundreds of migrants remained stranded for a third day on the Turkish side, a senior official said.

"We have triggered a plan for the start of the step-by-step deployment of up to 1,000 troops along the whole Bulgarian-Turkish border (within the next week)," interior ministry chief of staff Georgy Kostov said.

Supporters of Turkey's ruling Justice and Development Party (AKP) on Sunday stormed the headquarters of the Hurriyet newspaper in Istanbul after accusing the daily of misquoting President Recep Tayyip Erdogan, the publication said.

A group of 150 people chanting slogans supporting the AKP pelted the offices of Hurriyet in Istanbul's Bagcilar district with rocks, knocking out windows and the front door. 

Turkish authorities on Thursday launched dawn raids in Istanbul and the southern city of Mersin to arrest suspected members of an ultra-left group, a day after two of its militants attacked the Dolmabahce Palace in Istanbul, state media said.

Police detained over 40 suspected militants from the Marxist Revolutionary People's Liberation Party Front (DHKP-C) in Istanbul's Sariyer district on the shores of Bosphorus and several districts of Mersin, Anatolia news agency reported.

Two militants on Wednesday launched an attack with guns and explosives on the Dolmabahce Palace in Istanbul, one of Turkey's main tourist attractions which also houses offices of the prime minister, the Istanbul authorities said in a statement.

Initial reports had said gunfire and an explosion was heard outside the palace, which was crowded with tourists at the height of the summer season.

A Turkish 17-year-old has been killed in clashes in Istanbul between police and a group allied to the outlawed Kurdistan Workers Party (PKK), the official Anatolia news agency reported Wednesday.

The clashes erupted late Tuesday when a group of around 20 people sought to hold what was described as an unauthorized demonstration in the Esenler district of Istanbul and opened fire on the police, the report said.

Turkish authorities on Wednesday detained at least a dozen suspected members of the Islamic State (IS) jihadist group amid rising concerns about security throughout Turkey in an escalating cycle of violence.

Police detained the militants in coordinated dawn raids in the capital Ankara, as well as Istanbul, Hatay province near the Syrian border and the central Anatolian province of Kirikkale, the official Anatolia news agency reported.