KABUL, Afghanistan — Even by the standards of Afghanistan’s long war, the Taliban attack near a school that wounded dozens of schoolchildren on Monday stood out as unusually brutal, and expressions of outrage came thick and fast from governments around the world.

But from Doha, the Qatari capital where American negotiators were meeting with Taliban officials in a seventh round of talks, now in their fourth day, there was publicly only silence on the assault.

Several of the earlier rounds of talks, which began in earnest this year, also coincided with attacks in Afghanistan, where more than 32,000 civilians have been killed in the last decade of the war, now in its 18th year. Most of those deaths have been blamed on the insurgents, a result of indiscriminate bombings and suicide attacks.

In earlier rounds this year, American negotiators had brought up the violence at the negotiating table, according to officials with knowledge of the talks, speaking on condition of anonymity because of diplomatic sensitivities. But now they have stopped doing so, the officials said, in a possible sign of just how keen negotiators have become to seal a deal that would set a timeline for an American troop withdrawal in exchange for a Taliban promise not to let terrorists operate from Afghanistan.

At most, there have been condemnations on the margins of the earlier sessions. That happened again after Monday’s attack, which was apparently aimed at a government facility in Kabul, the Afghan capital, but badly damaged a nearby school, museum and television station.