Pakistani Prime Minister Syed Yousuf Raza Gilani has termed the US incursions into the country's tribal belt as an 'act of terrorism'.

A joint session of the parliament would be called soon to discuss the issue, Gilani told reporters at the Prime Minister House on Wednesday.

He added that the PPP-led government wants to unite all the political parties over 'this national issue of sovereignty', Geo reported.

Gilani's comments come after eight people were killed in a US drone strike at a house in the volatile northwest region of the country. The incident took place about midnight on Tuesday near the town of Mir Ali in North Waziristan.

In the past month, US forces have carried out seven missile strikes by pilotless drones and a commando raid on the Pakistani side of the border.

Washington's recent unilateral strikes inside Pakistan have triggered sovereignty debates within the corridors of the parliament in Islamabad.

Pakistani leaders including the president and premier have lashed out at the United States over violation of Pakistan's air and ground space and killing of innocent civilians.

Political analysts believe that though there's no war going on between the US and Pakistan yet, but recent exchanges of fire involving American and Pakistani forces are sounding like a sputtering fuse that's growing ever shorter.

JR/MMN