Russian propaganda news agency TASS also reported that according to the city's directorate for the development of road and transport infrastructure, sea and land public transport in Sevastopol has stopped moving.

The Information Center for Highways on the situation on the road approaches to the Crimean Bridge informed that vehicular traffic on the Crimean Bridge was temporarily blocked.

"Those who are on the bridge and in the inspection zone, we ask to remain calm and follow the instructions of transportation security officers", the report said.

At the same time, the Crimean Wind telegram channel noted that traffic on the Kerch Bridge had stopped even before the alarm, as the hacker attack "laid down" the system of electronic registration and control.

"Cash registers in Kerch and Sevastopol stores, accounting do not work. Yes, and a lot of Z-sites 'fell down'", the report says.

The air alert in Sevastopol announced at 15:36. Traffic on the Crimean bridge was restored at 3:58 p.m.

According to information from Crimean Wind, the sounds of several explosions similar to air defense systems were heard during the air alert in Crimea. According to preliminary reports, the explosions took place near Inkerman.

• Cyber specialists from the Main Intelligence Directorate of the Ukrainian Defense Ministry carried out an attack on Russian Internet service providers in temporarily occupied Crimea. Local "authorities" have warned the peninsula's population about possible problems with internet access