WINDOW ROCK, Ariz. (AP) — The closure of the Navajo Nation's tribal government because of the coronavirus outbreak is being extended into late May.

Tribal President Jonathan Nez on Wednesday announced that he issued an executive order Tuesday extending the closure of government offices and related facilities to May 17 from the previous expiration date of April 26.

Nez said there's a “slight flattening of the curve" but there's still a need to remain vigilant.

“We’re not letting our guard down – now is not the time," he said in a statement.

Nez noted that a 57-hour lockdown on the reservation on recent weekends will be repea over the coming weekend, beginning Friday at 8 p.m. and continuing until 5 a.m. Monday.

The tribe has reported 1,206 positive COVID-19 cases and 48 known deaths as of Tuesday, but officials said the numbers don’t include cases for border towns as was being previously reported by the Navajo Epidemiology Center.

The tribe″s reservation includes parts of Arizona, New Mexico and Utah.