The Nigerian government says that more than 200 girls abducted by Boko Haram in April are to be released as early as Monday, after it signed a ceasefire agreement with the Islamists.

People around the world are hoping the girls will be set free, but there are skeptics -- and bad signs coming from Boko Haram.

After the girls were kidnapped from the village of Chibok, the hashtag mantra #BringBackOurGirls kicked off an avalanches of posts.

Celebrities like First Lady Michelle Obama, teen Nobel laureate Malala Yousafzai, and actor Sean Penn joined in.

Even Pope Francis took to Twitter to call for their release.

Now, after the government made the announcement of their possible release, the hashtag has reawakened with messages of hope and anticipation.

"I am desperate for their return. I must sing a new song of joy," one poster wrote.

Another wrote, "I hope and pray this 189th day of the abduction of #OurGirls will be the last day we'll say #BringBackOurGirls. I fervently pray so!"

Islamists remain silent

But Boko Haram remains silent on the deal the government says it signed with the Islamists in neighboring Chad last week.

Instead, the group may be letting its weapons do the talking, continuing five years of war. Over the weekend, gunmen believed to be Boko Haram fighters attacked two villages and a town, killing at least eight and kidnapping others.

David Cook, who studies jihad, has doubts about the deal going through.

"It remains to be seen whether this truce will actually materialize, whether it is merely an election ploy for Nigeria's embattled president, Goodluck Jonathan, and most crucially whether it will bring about the release of numerous captives taken by Boko Haram during the past year," he wrote in an analysis for CNN.

President needs a success

The Islamists have employed particularly bloody tactics this year, killing thousands,

Boko Haram has gone after Christians, foreigners and educated people, driving them out of the country's northeast. And they have continued kidnapping.

They have often sidelined Nigeria's army. And government soldiers have at times mutinied, complaining of lacking support from the government.

Jonathan needs some good news going into February's polls.

Analyst Richard Joseph from the Brookings Institution shares Cook's doubts.

"This is a case when we will actually need to see the girls emerging from their six-month confinement before we can truly believe," he wrote after the government's announcement.

He fears that after so much war, the group may be disjointed and any ceasefire deals made with some members may not be heeded by others.

And like ISIS, Boko Haram has ambitions for a caliphate or religious state, which would mean it has long-term ambitions to keep fighting, Cook said.

But he believes that a deal could still be in Boko Haram's interest. They could use it to rest and regroup.

(CNN)