Oman will ban travel between all its governorates from July 25 to August 8 following a spike in coronavirus cases.
That's according to state news agency ONA, which described the measure as a "total lockdown" of all governorates.
The Gulf state will also implement a daily curfew between 7:00 pm and 6:00 am during the period.
Shops and public spaces will be closed during the curfew.
Oman recorded 1,458 new cases of infection on Tuesday and 11 deaths, taking the total tally to 69,887 cases and 337 deaths.
Oman introduced lockdowns in March in some regions such as Muscat, Dhofar, Duqm and some tourist towns. Since April, it has gradually allowed commercial centres to reopen and lifted the lockdown in the Muscat region.
Air and land borders have been closed, except for repatriation. Last week, the government said it would start allowing citizens to fly abroad after applying for permission.
US Defence Secretary Pete Hegseth said on Tuesday that the ceasefire with Iran was not over, even as the US and Iran exchanged fire in the Gulf as they wrestled for control of the Strait of Hormuz.
The US military said on Monday it destroyed six Iranian small boats and intercepted Iranian cruise missiles and drones as Tehran sought to thwart a new US naval effort to open shipping through the Strait of Hormuz.
A blast at a fireworks factory in China has killed at least 26 people and injured 61, flattening buildings and sending towering clouds of smoke into the sky, and prompting President Xi Jinping to order a thorough investigation, state media reported on Tuesday.
A Russian overnight missile and drone attack on Ukrainian gas production facilities killed five people, including two rescue workers, Ukrainian officials said on Tuesday, as Kyiv and Moscow exchanged rival ceasefire proposals.