A bomb attack killed three Pakistani soldiers and wounded another 15, striking a military convoy in North Waziristan, security officials said.
The officials said the bomb was detonated by remote-control near Miranshah, the main town in the tribal district.
The device exploded soon after the convoy left for the town of Datta Khel, ripping through a truck carrying army and paramilitary troops.
“Three soldiers were killed and 15 wounded,” an intelligence official told on condition of anonymity.
Another security official in the main northwestern city of Peshawar confirmed the attack and the casualties.
The bomb was planted in a drain near the market in Miranshah and exploded at a time when authorities had imposed a routine curfew so the military convoy could go past, the second official said.
In the neighbouring district of South Waziristan, a paramilitary soldier was killed when Taliban militants attacked a checkpost in the Makeen area, security officials in the main northwestern city of Peshawar said.
On Monday, the military announced the start of an operation in Kurram designed to clear out militants and suicide bombers who have taken refuge there, and open up the main road dissecting the tribal district.
Few details have emerged, however, of how the campaign is progressing.
