UNITED NATIONS (AP) — U.N. humanitarian chief Mark Lowcock warned Thursday that “a campaign of destruction” is taking place in Ethiopia’s embattled Tigray province, saying at least 4.5 million people need assistance and demanding that forces from neighboring Eritrea accused of committing atrocities in Tigray leave Ethiopia. As the Tigray crisis enters its fourth month, Lowcock said, the humanitarian crisis is deteriorating and “multiple credible and widely corroborated reports from Tigray … speak of widespread atrocities, involving mass killings, rapes and abductions of civilians, ongoing fighting across the region” as well as the destruction of harvests and key agricultural machinery.