The Pakistani army says its troops have killed as many as 55 more Taliban fighters in its offensive to retake a valley in the northwest from militants.

An army statement says helicopter gunships attacked militant hideouts in Mingora, the main town in the Swat Valley, and killed 15 enemy fighters.

It says an estimated 30 to 40 more died in clashes in more than a half-dozen other locations Saturday.

The military says four soldiers were wounded.