Responsibility was claimed by the Islamic State. IS also claimed online that it had destroyed electrical substations in recent weeks in several provinces. Kabul, Afghanistan's capital, suffered outages during the holiday.
More talks in Qatar
Amid seemingly unstoppable conflict, negotiators for the Taliban and the internationally backed government in Kabul disclosed on Sunday that they had met in Doha, Qatar, over the weekend to renew talks.
"Both sides agreed to continue the talks," tweeted the Taliban.
Visiting Kabul in mid-April, US Secretary of State Antony Blinken urged such talks as the US continues to withdraw the last of its 2,500-3,500 soldiers — and NATO its remaining 7,000 allied troops — from Afghanistan, scheduled to be complete by September.
At the time, President Ashraf Ghani asserted that Afghan forces were "fully capable" of controlling the country.
On Friday, US and Afghan officials said Washington had vacated a southern airbase — handing over facilities to government forces — at Kandahar, a former Taliban stronghold.
Concerns from China
On Saturday, Chinese Foreign Minister Wang Yi called the US-led withdrawals hasty and urged the United Nations to play a greater role.
In his phone call to his Pakistani counterpart, Shar Mehmood Qureshi, Wang said the pullout would "severely" affect regional stability.
Nishank Motwani, who researches security and diplomacy in Afghanistan from Australia, told the news agency AFP that the Taliban viewed the US's withdrawal as a win.
"It gives the insurgents a proclamation of victory, bookends their removal [in 2001] and eventual return to power, and signals that the end is in sight for the Afghan republic in its current state," Motwani said.