Some elements of the Taliban in Afghanistan are showing interest in peace talks, the top U.S. commander in Kabul said Wednesday, citing "off stage" contacts involving what he described as mid- and high-level leaders of the insurgency.

"A number of channels of dialogue have opened up between the various stakeholders in the peace process," Nicholson told reporters at the Pentagon. Speaking from his office in Kabul, Nicholson said he could not name names because the contacts are being pursued confidentially to improve the chances of advancing toward actual peace talks.

"What you're seeing right now is a lot of the diplomatic activity and dialogue is occurring off the stage, and it's occurring at multiple levels," he said. "So you see mid-level, senior-level Taliban leaders engaging with Afghans." He added that unspecified international organizations, foreign governments and other interested parties also are involved.

U.S. officials have talked up the prospects for peace many times over the course of the 17-year war in Afghanistan, only to be disappointed. When President Donald Trump announced last August that he was committing to winning the war with a revamped strategy, he said the goal was to compel the Taliban — with help from Pakistan and other interested nations — to seek peace. However, a U.S. government watchdog agency recently reported that it saw few signs that this strategy was working, while acknowledging that the Afghan security forces are getting better training.

Inside the Taliban, Nicholson said, there is a "robust dialogue" underway with regard to whether and how to end the war. He asserted there are "many points of intersection" between Taliban and Afghan proposals for pursuing peace.

"This is what, you know, leads me to the conclusion that there's tremendous potential to advance the reconciliation dialogue," he said. "And, again, I don't want to go any further. My diplomatic colleagues are the ones that are involved in this, and their ability to be successful depends in part upon the confidentiality of the process."

Seth Jones, a counterterrorism expert at the Center for Strategic and International Studies, said there appears to be little prospect of an end to the battlefield stalemate between the Taliban and U.S.-supported Afghan forces. He said the Taliban lack military capabilities and popular support to hold key pieces of terrain, particularly in urban areas. But the Afghan government, he said, "is unlikely to defeat the Taliban on the battlefield for the foreseeable future."

Among the things that could change the outlook, Jones said in an email exchange, are a shift by the U.S. to successfully target the most senior Taliban leaders, all of whom he said are based in Pakistan, including the top leader, Haibatullah Akhunzada.

Nicholson, who has commanded U.S. and coalition forces in Afghanistan since March 2016, is due to leave his post this summer. The Pentagon on Tuesday announced that Trump nominated Army Lt. Gen. Scott Miller to succeed Nicholson.

While speaking hopefully of peace prospects, Nicholson also told reporters that U.S. rocket artillery struck a gathering of Taliban commanders on May 24 in the Musa Qala district of Helmand province, killing "dozens." His spokesman, Lt. Col. Martin O'Donnell, said earlier that more than 50 were killed but that an exact count has not yet been established.

On Wednesday, O'Donnell's office put out a written statement saying that a series of U.S. strikes over a 10-day period in May, including the Musa Qala strike, had killed more than 70 "senior Taliban leaders." It said these included the deputy shadow governor of Helmand province and multiple Taliban district governors.

In his description of the Musa Qala operation, Nicholson said the targeted Taliban commanders had assembled upon returning from the western province of Farah, where their fighters had attacked multiple security checkpoints and briefly taken control of the provincial city of the same name. Nicholson said 50 of these commanders had been tracked to Musa Qala and targeted by U.S. rocket artillery.

While saying the U.S. attack had disrupted the Taliban network in Helmand province, including its drug trafficking, Nicholson stopped short of saying the killing of dozens of insurgent commanders would have a decisive impact on the war.

"I would not call it strategic significance, but it definitely has a significant local significance in terms of the fight in southern Afghanistan," he said.