NAIROBI, Kenya (AP) — Ethiopia’s prime minister says the army has been ordered to move on the embattled Tigray capital after his 72-hour ultimatum ended for Tigray leaders to surrender, and he warns the city’s half-million residents to stay indoors and disarm. This means tanks and other weaponry can now close in on Mekele. The government had warned of “no mercy” if residents didn’t move away from the Tigray leaders in time. The new statement says Ethiopian forces will take utmost care to protect civilians. Meanwhile, the United Nations says shortages have become “very critical” in Tigray as its population of 6 million remains sealed off.