Turkey's military says security forces have killed eight Kurdish rebels in a clash in a mainly-Kurdish town in southeast Turkey.

A brief military statement on Wednesday said the Kurdish rebels opened fire on the security forces in the town of Cizre, drawing response from the troops.

Cizre and the nearby town of Silopi have been under a government-imposed curfew since Monday as government forces battle militants linked to the Kurdistan Workers' Party, or PKK, who have moved their fight for Kurdish autonomy to some towns and city neighborhoods.

Hundreds of people have died since July in renewed fighting between the PKK and Turkish troops. The violence has also derailed a fragile peace process with the rebels.

A pro-Kurdish party says 63 civilians have died since August in operations during curfews.