LONDON (AP) — U.K. Defense Secretary John Healey unexpectedly quit on Thursday, saying the government is unwilling to spend enough on the military at a time of “rising threats.” The resignation dealt another blow to embattled Prime Minister Keir Starmer, who is already facing demands from Labour colleagues to step down.

Healey told Starmer in a letter that the government’s Defense Investment Plan falls “well short of what is required at this dangerous time.”