World Blog is closing down for the evening. We'll be back Tuesday morning.

You can follow major developments in Egypt overnight on msnbc.com's Middle East in Crisis special section and from our partners, The New York Times. You can track real-time developments on breakingnews.com and on Twitter at @breakingnews.

Other good sources:

• Al-Jazeera's English service. The channel's live stream is especially useful.

• Continuing coverage is available from Reuters' dedicated Egypt page and from The Associated Press' World page. 

• The BBC has live updates here.

• Quick updates and robust commentary is available on Twitter at two hashtags: #egypt and #jan25.

• The U.S. Embassy in Cairo is posting official U.S. government updates and travel advisories.

Egypt has moved about 800 troops into the Sinai peninsula with Israel's consent, Reuters reports: 

Permission was granted in response to a request from Cairo, and the forces have been deployed around the southern Sinai resort of Sharm el-Sheikh, one [Israeli] official said. Two other officials confirmed that Israel had granted such a request. ...

Israel Radio said "Israel is looking the other way" as Egypt positions forces in the Sinai "to try to make sure the situation doesn't get out of hand" there.

Israel last let Egypt station armed forces in Sinai after it pulled its own troops out of Gaza in 2005.