The Pentagon on Thursday said the Taliban’s refusal to meet commitments to reduce violence in Afghanistan is raising questions about whether all US troops will be able to leave by May as required under the peace agreement. Pentagon chief spokesman John Kirby said the US stands by its commitment for a full troop withdrawal, but the agreement also calls for the Taliban to cut ties with Al Qaeda and reduce violence. Echoing what senior military and defence leaders asserted in recent months, Mr Kirby said the Taliban has not yet met the requirements set in the peace agreement. “Without them meeting their commitments to renounce terrorism and to stop the violent attacks against the Afghan National Security Forces, it’s very hard to see a specific way forward for the negotiated settlement,” Mr Kirby said. “But we’re still committed to that.” White House and State Department officials made it clear that President Joe Biden's administration plans to take a new look at the peace agreement, which was signed last February with the Trump White House. The White House said Mr Biden’s national security adviser, Jake Sullivan, told his Afghan counterpart in a phone call last Friday that the new administration will review the deal. And newly installed Secretary of State Antony Blinken said on Wednesday the administration wanted to take a detailed look to “understand exactly what is in the agreement” before deciding how to proceed. "The Taliban are not meeting their commitments to reduce violence and reduce their ties to Al Qaeda," Mr Kirby said on Thursday. “As long as they’re not meeting their commitments, it’s going to be difficult for anybody at that negotiating table to meet their commitments. In fact it wouldn’t be the wise course. We obviously are still committed to ending this war, but we want to do it in a responsible way.” The peace agreement called for the US to reduce troop levels to 2,500, and then to remove all forces by May. Former president Donald Trump ordered US troop levels in Afghanistan cut to 2,500 just days before he left office, presenting Mr Biden with difficult decisions about how to retain leverage against the Taliban in support of peace talks. A key concern in the Pentagon is the continued high levels of Taliban violence against the Afghans. And some US officials have questioned the wisdom of fully withdrawing if levels of violence remain high. Military officials said there are 2,500 US troops in Afghanistan, mainly conducting counterterrorism operations. Taliban representatives and the Afghan government this month resumed peace talks in Qatar, the Gulf Arab state where the insurgents maintain an office. The stop-and-go talks are aimed at ending decades of conflict. But frustration and fear grew after a recent surge in violence, and both sides blame the other.