Twitter lit up late tonight with buzz that veteran war correspondent Richard Engel of NBC News and his producer have gone missing in Syria. Details are sketchy and foreign reports are notoriously unreliable:

https://twitter.com/MazharYasin/status/280355131713789952

https://twitter.com/katz/status/280579005529329664

Here are Engel’s last tweets,  with the most recent dated Dec. 6:

On Dec. 13, NBC Nightly News tweeted a video of Engel inside war-torn Aleppo, Syria:

Many have Engel in their thoughts and prayers around the world. Let’s hope he’s found safe and sound:

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Update: Twitter journos and writers are reporting that NBC can’t reach Engel this morning.

https://twitter.com/Wheezyruth123/status/280707817835462656

https://twitter.com/DinoKiefer/status/280709189825863682

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Update: Jeremy Scahill, who writes for the Nation, appears to be talking about Engel here:

There are reports that NBC News has asked media not to report on the story. With thousands of people tweeting about this (“Richard Engel” is a Twitter trending topic in the United States), it’s going to be impossible to put this genie back in the bottle.

Update: Richard Engel and his crew have been freed after five days of captivity, according to NBC News.