BEIRUT (Reuters) – The Syrian military has declared a 72-hour “regime of calm” covering all of Syria from 1 a.m. on Wednesday (1800 EDT Tuesday), a military source told Reuters, although fighting and air attacks have been reported since then.

The military high command said in a statement that “a regime of calm will be implemented across all territory of the Syrian Arab Republic for a period of 72 hours from 1 a.m. on July 6 until 2400 on July 8, 2016”.

The Syrian government uses the term “regime of calm” to denote a temporary ceasefire.

The truce covers the three-day Eid al-Fitr holiday celebrated by Muslims to mark the end of the fasting month of Ramadan. There was no indication that it had been agreed with any of the myriad groups opposing the government.

Syrian rebel group Jaish al Islam said in a statement that, despite the announced truce, government and allied forces had attacked the town of Maydaa, in the Eastern Ghouta area east of Damascus. Maydaa had been held by Jaish al Islam, which is part of the High Negotiations Committee (HNC) representing the opposition at international peace talks.

The Syrian Observatory for Human Rights said on Wednesday that government and allied forces had taken almost complete control of Maydaa and that fighting continued. Syrian state media said the army and its allies had taken ground from “terrorists” in the area. The Syrian government describes all groups fighting against it as terrorists.

The Britain-based Observatory, which monitors the Syrian conflict, also said there had been rebel and government shelling in areas around the northern Syrian city of Aleppo, and air strikes had hit towns in the northern Aleppo countryside on Wednesday.

Syrian state media also reported army operations against Islamic State militants across the country on Wednesday.

A ceasefire brokered by foreign powers in February to facilitate talks to end the five-year civil war has mostly unraveled in areas where it took effect in the west of the country.

That truce was agreed with many opposition militias, but did not include the al-Qaeda affiliated Nusra Front or Islamic State.

Since then, the Syrian army and the Russian military, which supports Syrian President Bashar al-Assad, have announced a number of temporary local truces in areas of intense fighting, for example in the city of Aleppo or near the capital Damascus.

But air strikes and fighting have often continued in spite of the declarations.

(This version of the story recasts the headline)

(Reporting by Lisa Barrington; Editing by Kevin Liffey and Hugh Lawson)