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Heavy monsoon rains kill 40 people in Pakistan, government issues warning on flash floods

  • A Pakistani protester uses plastic sheet to cover herself from rain as she moves to another place at the premises of parliament building where they camped in Islamabad, Pakistan on Thursday, Sept. 4, 2014. Negotiators for thousands of protesters demonstrating outside of Pakistan's parliament met with politicians trying to end the crisis, but key challenges appear to remain — including their demand that the prime minster resign. (AP Photo/Anjum Naveed)

    A Pakistani protester uses plastic sheet to cover herself from rain as she moves to another place at the premises of parliament building where they camped in Islamabad, Pakistan on Thursday, Sept. 4, 2014. Negotiators for thousands of protesters demonstrating outside of Pakistan's parliament met with politicians trying to end the crisis, but key challenges appear to remain — including their demand that the prime minster resign. (AP Photo/Anjum Naveed)  (The Associated Press)

  • A Pakistani protester flashes a victory sign in a tent setup with plastic sheet to shield himself from rain at the premises of parliament building in Islamabad, Pakistan on Thursday, Sept. 4, 2014. Negotiators for thousands of protesters demonstrating outside of Pakistan's parliament met with politicians trying to end the crisis, but key challenges appear to remain - including their demand that Prime Minister Nawaz Sharif resign. (AP Photo/Anjum Naveed)

    A Pakistani protester flashes a victory sign in a tent setup with plastic sheet to shield himself from rain at the premises of parliament building in Islamabad, Pakistan on Thursday, Sept. 4, 2014. Negotiators for thousands of protesters demonstrating outside of Pakistan's parliament met with politicians trying to end the crisis, but key challenges appear to remain - including their demand that Prime Minister Nawaz Sharif resign. (AP Photo/Anjum Naveed)  (The Associated Press)

  • A Pakistani protester wraps a plastic sheet to cover herself from rain as she and others camped at the premises of parliament building in Islamabad, Pakistan on Thursday, Sept. 4, 2014. Negotiators for thousands of protesters demonstrating outside of Pakistan's parliament met with politicians trying to end the crisis, but key challenges appear to remain - including their demand that Prime Minister Nawaz Sharif resign. (AP Photo/Anjum Naveed)

    A Pakistani protester wraps a plastic sheet to cover herself from rain as she and others camped at the premises of parliament building in Islamabad, Pakistan on Thursday, Sept. 4, 2014. Negotiators for thousands of protesters demonstrating outside of Pakistan's parliament met with politicians trying to end the crisis, but key challenges appear to remain - including their demand that Prime Minister Nawaz Sharif resign. (AP Photo/Anjum Naveed)  (The Associated Press)

Pakistani officials say heavy monsoon rains have killed 40 people across the country as the government warned of more flash flooding over the weekend.

Ahmad Kamal, a spokesman for the National Disaster Management Authority, said Friday that 13 people died when roofs collapsed in the eastern city of Lahore the previous day.

The rains triggered landslides that killed six civilians and three soldiers in the Pakistani-administered Kashmir on Thursday.

Heavy rains also lashed the capital, Islamabad, where thousands of opposition supporters have camped outside the parliament for weeks, demanding Prime Minister Nawaz Sharif resign over alleged voting fraud. The protesters used makeshift tents made from plastic sheets to shelter from the rains.

Pakistan regularly suffers from flooding during the monsoon season. In 2010, flash floods killed 1,700 people in Pakistan.