Shahzaib Akber / EPA

Earthquake survivors live in temporary shelters Saturday in Awaran, in Pakistan's Balochistan province.

ARAWAN, Pakistan - The death toll from an earthquake in  southwestern Pakistan has reached 515, a provincial official has said, as  insurgent attacks threaten relief efforts and survivors complain of lack of  shelter from the scorching sun. 

A 6.8 magnitude aftershock jolted the same region on Saturday, bringing down more buildings amid ongoing search and rescue efforts. Local officials said by telephone it was likely the second quake had caused more deaths.

Babar Yaqoob, the Chief Secretary of  Baluchistan, gave the updated death toll on Friday as he toured the destroyed region of  Awaran, where the 7.7 magnitude quake struck on Tuesday.

Bodies are still being  discovered in houses whose mud walls and wooden roof beams had collapsed.

"My daughter was killed when my house collapsed - I was also inside my  house but manage to run out," said 70-year-old Gul January "We are sitting under  the scorching sun and need shelter." 

In Labash village near Awaran, more  than half of the 3,000 houses have collapsed and those still standing have wide  cracks. 

"Everywhere we go people are asking for tents," legislator Abdul  Qadeer Baloch said. 

Banaras Khan / AFP – Getty Images

Pakistani earthquake survivors receive tents Saturday at a distribution point in the devastated district of Awaran.

The arid area is also a stronghold of separatist  Baluch insurgents, who have twice shot at helicopters carrying military  officials in charge of responding to the disaster. 

On Thursday, two  rockets narrowly missed the helicopter carrying the general in charge of the  National Disaster Management Agency and on Friday shots were fired at two  helicopters carrying aid, the military said. 

"There is a law and order  situation here and other hurdles but despite everything, we will get to every  last person," said Lt. Gen. Nasir Janjua, the highest ranking military official  in the province. 

Aid must travel by pitted roads that cut through  mountains held by the insurgents. 

The rebels, who have killed many  civilians and members of the security forces, are fighting for independence from  Pakistan. They accuse the central government of stealing the province's rich  mineral deposits and the security forces of widespread human rights abuses.