NATO says three of its service members lost their lives in Afghanistan Saturday.

A NATO statement says one of the soldiers died in a bomb blast in southern Afghanistan, another one in an insurgent attack in the west, and the third one as a result of a non-battle related injury in the east.

The nationalities of the soldiers were not released.

In an unrelated development, senior Afghan officials say representatives from Afghanistan, Pakistan and the United States will hold a meeting of their trilateral Core Group Sunday at the Afghan embassy in Tajikistan.

The meeting will take place on the sidelines of the fifth Regional Economic Cooperation Conference for Afghanistan. Among issues to be discussed will be the Afghan peace process and follow up of Afghan President Hamid Karzai's visit to Islamabad last month.

According to an Afghan Ministry of Foreign Affairs press release, Afghanistan will be represented by Deputy Foreign Minister Jawed Ludin, Pakistan by Foreign Secretary Jalil Abbas Jilani and the U.S. side by special representative for Afghanistan and Pakistan, Marc Grossman.