The militants, armed with RPGs and other heavy weapons, attacked the Mami Khel checkpoint located between Tiarza and Ladha tehsils of Upper South Waziristan, reported Pakistan's leading Dawn News.

According to reports, the security personnel retaliated and after some time the terrorists escaped from the spot.

The deceased security personnel and the injured were shifted to South Waziristan Scouts Hospital in Wana.

The deceased people were identified as Havaldar Nisar Buda Khel, Lance Naik Rasheed Mangal, Lance Naik Irfan and Sepoy Usman Gujjar.

The area was cordoned off and an investigation was soon launched by security personnel to capture the attackers.