PESHAWAR: Pakistan's tribal areas held their first ever provincial elections on Saturday amid high security, a key step bringing the northwestern region into the political mainstream.

More than 2.8 million people lined up to vote for 16 representatives for the provincial assembly after polls opened on Saturday morning, Suhail Khan, a spokesman for the election commission, told AFP.

No violence was reported and polls closed at 5:00 pm without any disturbances, officials said.

The seven tribal districts -- Bajaur, Khyber, Kurram, Mohmand, North Waziristan, Orakzai and South Waziristan -- are home to some five million residents, mainly ethnic Pashtuns. They were previously only allowed to elect representatives for the National Assembly in Islamabad.

Candidates from all the main political parties contested Saturday's elections, including two women -- a rarity in the ultra-conservative region.

The legislation passed last year extended the writ of Pakistani courts to the area, with hopes that it would bring development assistance to the region which Washington has long insisted provides safe havens to militants including the Taliban and Al Qaeda -- an allegation that Islamabad denies.