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Christo Grozev

23 Jan, 6 tweets, 2 min read

Two mobile networks in Russia "experiencing connectivity problems", Russian media report, as far Eastern cities see turnout not seen since 2008.

Arrests began on Pushkin square more than an hour before the start of the protests in Moscow, riot police appears to be targeting random people. Reminds of Belarus a few months ago.

In fact all mobile networks in Russia have a spike of disruptions this morning. Given that crowd congestion in the main cities has not yet happened, it appears these are artificially introduced.

This app shows connectivity issues on all Russian networks, have a look at the spikes. downdetector.ru/ne-rabotaet/me…

Social networks appear to be artificially throttled too downdetector.ru/ne-rabotaet/tw…

Journalists from Fontanka and Meduza detained in St. Petersburg with no explanation given

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More from @christogrozev

Christo Grozev

@christogrozev

23 Jan

1090 persons arrested nationwide so far as part of #23января protests

@Reuters

40,000 persons at Moscow protest, per @Reuters estimate.

Riot police clashes with protestors at Strastny blvd, via Baza

Read 5 tweets

Christo Grozev

@christogrozev

23 Jan

..and in Moscow

Reposting this video; it's from Ekaterinburg, not St Petersburg.

@tvrain

.@tvrain have a camera at an apartment overlooking Pushkin square. Police are now trying to break into this apartment to cut off broadcast, currently trying to break in via neighbor's balcony.

Read 4 tweets

Christo Grozev

@christogrozev

17 Jan

Walking to passport control

@navalny

After @navalny was taken away by police, his wife, lawyer and aid remained waiting behind passport control...this means there's a chance he might be released tonight... possibly with a writ of simmons. Let's hope for that.

A press release by the prison authority announced just now that he has been detained until a court decision on their request to convert his suspended sentence to a real one.

Read 4 tweets

Christo Grozev

@christogrozev

17 Jan

Hm....not the way to Vnukovo, suddenly.

Ok, turning back , maybe to Vnukovo after all.

@novaya_gazeta

Ok now it's going straight towards Sheremetyevo. Although @novaya_gazeta reports a military airport received an alert of. unplanned landing aircraft

Read 8 tweets

Christo Grozev

@christogrozev

17 Jan

A passenger is being taken off the plane, while Navalny hasn't boarded yet...

@navalny

.@navalny :"Please let me through, or they will say he didn't arrive due to chaos on board"

Read 4 tweets

Christo Grozev

@christogrozev

27 Dec 20

Got a few questions about how we did the (partial) face comparison in our latest investigation. This is a valid question given that the standing man in the Omsk hospital wears a mask. As this issue is bound to pop-up in the foreseeable future in our Covid times, I will explain.

Obviously, the publicly available professional-grade face-verification services like Azure are not geared up to compare partial faces to other faces. In fact, they don't recognize a mask-covered face as a face at all.

So we need to cheat the system and use a proxy for the missing half-face of our unknown suspect. The idea is to force the software to give us a face match based on the upper face section (eyes, skull shape, ears = signal), while ignoring the lower part (nose, mouth, chin = noise)

Read 10 tweets

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