DAMASCUS, Syria -- Residents of the Syrian capital expressed skepticism on Monday about reports that a "provisional agreement" has been reached for a truce, a day after a wave of ISIS bombings killed about 130 people in government-held areas near Damascus and beyond.
Details of the tentative cease-fire, announced in Jordan on Sunday by U.S. Secretary of State John Kerry, have not been made public. Even if a truce were to take hold, ISIS is not party to any such cease-fires or negotiations for a truce.
Sunday's blasts that ripped through the Sayyida Zeinab suburb of Damascus and the central city of Homs were among the deadliest bombings in government-held areas in Syria's devastating five-year civil war.
ISIS claimed both attacks. The extremists are dug in on the outskirts of the two cities and have repeatedly targeted pro-government strongholds.
Walking through a street Monday morning where one of the bombs sheered the front of buildings off in Damascus, CBS News correspondent Elizabeth Palmer described the damage as "epic."
While no peace talks have ever included ISIS, Palmer said the bombings on Sunday proved the extremists "commitment to total war."
But while the other players in the grinding, five-plus-year conflict say they're ready for some kind of a truce, Palmer says the devil, as ever, is in the details. If Kerry and Russian Foreign Minister Sergey Lavrov managed to agree over the weekend on when a cease-fire should take hold, who would participate and -- crucially, who would monitor it -- they never said as much.
The mood in government-controlled Damascus was subdued on Monday. Inside the Hamidiyeh Souk, a popular bazaar typically crowded with shoppers on any given day, people said they were worried that a cease-fire would not be evenly observed and could leave the Syrian authorities vulnerable.
"I hope there will be no cease-fire. Because if there is a cease-fire, Turks will increase their support for criminals and traitors," said Ahmad Al-Omar from the northern Aleppo province, adding that Turkey may seek to let opposition fighters in via its border with Syria.
Others at the bazaar echoed President Bashar Assad's statements that a cease-fire could give an advantage to rebel forces and also ISIS.
"I believe that those proposals now are ... a pretext to stop the advance of the Syrian army which is trying to liberate the homeland," said Ahmad Al-Issa.
Sunday's blasts came as Kerry announced that a "provisional agreement" has been reached on a cessation of hostilities that could begin in the next few days. But he acknowledged that it's not finalized and all parties might not automatically comply.
Kerry declined to go into the details of the agreement, saying it "is not yet done."
"The modalities for a cessation of hostilities are now being completed," Kerry said, adding that it was "possible over the course of these next hours."
The Damascus authorities said the government was ready to take part in a truce as long as it is not used by militants to reinforce their positions. Syrian troops, backed by Russian warplanes are on a major offensive in the northern Aleppo province, trying to seal the border with Turkey, a key supporter of the rebels, before any truce is reached.
Meanwhile, the Syrian government's supply route to the city of Aleppo was cut by heavy fighting Monday as the army, supported by allied militias and the Russian air force, fought to consolidate its recent gains in the northern province.
The Britain-based Syrian Observatory for Human Rights, which relies on a network of contacts to monitor the war, said Islamic militias assaulted government-held positions around Khanaser, a town southeast of Aleppo, setting off intense clashes that have lasted through the day. Khanaser lies along the government's only access route to Aleppo.
Aleppo, Syria's largest city and one-time commercial center, is divided between the government and its opponents, while ISIS holds a wide front to the east of the city.
Fighting has been fierce in Aleppo province in recent weeks amid a government offensive to cut off the rebel stronghold.
The Russian Foreign Ministry put out a statement on Monday condemning Sunday's bomb blasts in Damascus and Homs and calling for a "proper, principled response" from the international community to prevent terrorist groups from further aggravating the situation in Syria and inciting sectarian strife.
"The brutal crimes by extremists are aimed at intimidating the civilian population and undermining attempts to achieve a lasting political settlement of the Syrian crisis in the interests of all Syrians and efforts to end the violence and bloodshed," the Russian statement said.