One person was killed and seven more wounded when rockets fired from Syria slammed into the Turkish border region of Kilis, which has been regularly targeted by militants this year, the Dogan news agency said.

Kilis, which lies opposite areas controlled by Islamic State (IS) militants in Syria, has been battered since January by rocket fire from the other side of the border.

The latest firing of four Katysuha-type rockets from Syria brought the death toll from such incidents since the start of the year to 21.

Turkey has hit back with artillery fire of its own against IS fighters but has always stopped short of making any firm commitment to send its troops over the border.

Prime Minister Ahmet Davutoglu said on Wednesday Turkey is ready to send ground troops into Syria if necessary but would prefer to act alongside its international allies.