Update(1208ET): More details have emerged of what marks the third major Ukrainian sabotage bombing of the key bridge linking the Russian mainland to the Crimean peninsula, as the pace of the war heats up:

Ukraine said it attacked the Crimean Bridge with explosives as Russia closed traffic on the route linking the annexed Black Sea peninsula with the Russian mainland.

Agents planted mines on underwater supports and detonated them on Tuesday, the Ukrainian Security Service, known as the SBU, said in a statement on Telegram. The SBU said the operation took place over several months and left the bridge in an emergency condition, which couldn't be independently verified.

Ukrainian intelligence over the weekend was busy blowing up other civilian bridges inside Russia as well, resulting in the deaths of seven people, and scores more casualties, as we detailed.

"The bridge was originally shut for more than three hours starting in the morning local time, and then again for almost two-and-a-half hours, the news agency said," according to Bloomberg. "Maritime passenger transportation was suspended in Sevastopol, the city's road and transport infrastructure authority said, also without explaining what prompted the interruption, according to Interfax."