At least two young people died at a hospital in eastern Turkey, allegedly after being poisoned with acid, state media reported Wednesday.

The deaths in the southeastern city of Diyarbakir were the first of this year's so-called "Euphrates Shield" operations in which the Kurds have been fighting to retake the city from the Islamic State group and control its oil-rich region of Iraq and Syria.

The first fatality occurred in the morning, when a 15-year-old boy was killed in a car accident with his mother and another girl and a third girl was hospitalized with severe burns, Turkish media reported.

Later in the day, the two girls were found with severe burns. A fourth victim was found in the hospital with a similar condition. The fifth victim was hospitalized with burns and bleeding on his brain, according to state-run Anadolu news agency.

Turkish authorities did not provide details on the girls' names, and media reports said they were 17 and 15, but both bodies were identified as being from the same family.

In the third fatality, a 23-year-old woman was hospitalized after allegedly being poisoned by the chemical substance "alabaster" after trying to drink acid, a health ministry official said Wednesday.

A man was also arrested in the attack, Anadolu said.

The deaths occurred as the Syrian Kurds are trying to seize Mosul, the biggest city in the oil-rich province of northern Iraq, after being largely dislodged by the Islamic State group from their town of Kobane in June. The Kurds are now working to defend the city, which is their home.

A number of children are believed to have died in the attacks in the two provinces.

In an interview with Reuters in Istanbul, Anbar Governor Saleh Muslim said Kurdish forces had killed 10 civilians