Turkey's state-run news agency says Turkish troops have returned fire after a mortar shell from Syria again landed on its territory.

The Anadolu Agency quoted the governor for Hatay province as saying that Turkish troops "responded with fire" after the mortar round landed in a rural area of the province that borders Syria. No one was reported hurt.

Turkish artillery has fired at Syrian targets for two straight days after shelling from Syria killed five civilians in Turkey. Turkey's parliament on Thursday also voted to allow cross border military operations in Syria.

The uprising against Syrian President Bashar Assad erupted in March 2011 and has gradually morphed into a bloody civil war, killing more than 30,000 people, according to activists.