The report focuses on the lack of transponders in the fire trucks, which investigators suggested could have allowed an automatic warning system to alert the controller of an imminent collision.

As the Kremlin spends heavily on censorship technology, Russians are scrambling to find new ways to circumvent the limits.

With new outages and blockages, President Vladimir V. Putin is taking his boldest steps yet to control Russians’ communications.

As Iranian authorities restore some online services after crushing antigovernment demonstrations, they are using a technological dragnet to target attendees of the protests.