Turkish authorities have detained 311 people suspected of disseminating "terror propaganda" over Ankara's offensive against a Kurdish militia in Syria, the interior ministry said on Monday.

The United States has told Turkey it will not provide any more weapons to the Syrian Kurdish YPG militia, the Turkish presidency said, as Turkey's offensive against the US-backed YPG in Syria entered its eighth day.

Two Turkish soldiers were killed in Turkey's southeastern province of Hakkari in an attack by Kurdish Workers Party (PKK) militants, the military said on Monday.

Turkey's military said on Wednesday that more than 80 militants were killed in an air strike on Monday in northern Iraq, where Turkish jets have frequently targeted PKK fighters.

A Turkish military vehicle was hit by an improvised explosive device in the southeastern province of Hakkari, killing one soldier, security sources said on Monday.

An improvised bomb attack on a military vehicle killed two soldiers in southeast Turkey on Saturday, with state media blaming Kurdish separatists.

Explosives planted by Kurdistan Workers Party (PKK) militants ripped through a Turkish military vehicle travelling through southeast Turkey on Monday, wounding 17 soldiers, the military said.

Turkey on Wednesday reacted furiously to a US plan to arm Syrian Kurdish fighters whom Ankara considers terrorists, but the force battling jihadists said the move would hasten the extremists' defeat.

Turkish warplanes killed more than 20 Kurdish fighters Tuesday in strikes in Syria and Iraq, where the Kurds are key players in the battle against the Islamic State group.

Turkish police detained 26 people over a car bomb attack in the south-eastern town of Viransehir, Interior Minister Suleyman Soylu said on Saturday.

Turkey has arrested five soldiers in connection with a deadly suicide attack on the military claimed by a Kurdish radical group in the central city of Kayseri, state media said on Friday.

A splinter group of the outlawed Kurdistan Workers' Party (PKK) on Wednesday claimed responsibility for a car bomb and gun attack that left two people dead in the Turkish city of Izmir this month, a report said.