The United States will review the peace agreement reached with the Taliban last year, White House national security adviser Jake Sullivan told his Afghan counterpart in a phone call on Friday, according to a White House statement, Reuters reported.

Under a February 2020 deal between the United States and the Taliban, US forces are to leave Afghanistan by May 2021 in exchange for counter-terrorism guarantees.

Last week the number of US troops in Afghanistan went down to 2,500.

But violence levels in Afghanistan have surged, hastening international calls for a ceasefire between the Afghan government and the Taliban.

Sullivan told Afghan national security adviser Hamdullah Mohib that the review would assess “whether the Taliban was living up to its commitments to cut ties with terrorist groups, to reduce violence in Afghanistan, and to engage in meaningful negotiations with the Afghan government and other stakeholders,” the statement said.