12 militants were killed when security forces clashed with them in Pary Gharin area of South Waziristan Agency, security sources said.
In a separate incident, at least 43 militants were killed in aerial strikes conducted in North waziristan.
28 militants were killed in Shawal area and 15 in Gharlamai after the military jets bombed their hideouts, an Inter-Services Public Relations (ISPR) statement said.
Today's strikes came two days after the military claimed it had killed at least 65 militants in the air strikes in North Waziristan and Khyber Agency on Monday.
The operation is in its final phase and will be concluded by the end of this year. Army claims that more than 1,600 militants have been killed in the operation.