Pakistani officials say up to 100,000 people have fled their homes in the country's northwest as a result of a military offensive to root out Islamist militants.

The offensive was launched earlier this month in the tribal area of Kurram, where thousands of Taliban and al-Qaida-linked militants have bases and training camps.

Officials from the Federal Disaster Management agency told reporters Wednesday they have so far registered close to 10,000 families or up to 100,000 people who have been forced to flee their homes. Many of the displaced are living in camps, while others are staying with relatives.

Elsewhere in Pakistan's tribal region, a landmine blast killed a soldier and injured several others Wednesday in the Mohmand agency near the Afghan border.