As many as eight rockets fired from Syrian territory controlled by the Islamic State terror group landed in Turkey on Tuesday, killing two people including a 4-year-old boy, officials said.

The mayor of the border city of Kilis, Hasan Kara, said Turkish artillery retaliated by firing at ISIS targets in Syria.

At least one of the rockets fired from Syria hit a neighborhood in Kilis, killing a woman and injuring two boys riding inside a car. The youngest boy died on his way to hospital, while his 6-year-old brother was in stable condition.

Kara said officials were urging people in the area to stay indoors. Schools in Kilis were evacuated and would remain closed.

The Turkish military has been retaliating to any rockets or shells fired from Syria that land on Turkish territory in line with its rules of engagement.

The state-run Anadolu Agency said one of the rockets fired from Syria landed in an area close to a hospital. At least two rockets fired exploded on empty land.

A black plume of smoke was seen rising from a building in the residential district, Reuters reported, citing TRT World.

It was not clear exactly who fired the rockets. It is not uncommon for a stray rocket to land in southern Turkey due to the civil war unfolding not far away.

The Associated Press contributed to this report