The global media is very fragmented, and people don't get information from other countries very easily.

Russians have already launched an ongoing investigation, and are reporting it locally as follows... I'll use Google Translate from one of the Telegram channels carrying the news:

The case of the explosion on the Crimean bridge was brought under the article "terrorism". During the investigation of the terrorist act on the Crimean bridge, many witnesses and eyewitnesses were interrogated, special expert studies were started and largely completed — Bastrykin

As the head of the Investigative Committee noted at a meeting with the President of the Russian Federation, explosive, genetic and forensic examinations were carried out. He also said that relevant instructions had been given to the FSB and the Ministry of Internal Affairs of Russia to conduct operational-search activities.

Later that day:

In preparing the terrorist attack on the Crimean bridge, the Ukrainian special services resorted to the services of a fly-by-night company - it was through it that they ordered the ill-fated truck

According to media reports, the driver Mahir Yusubov was transporting cargo on the order of the TEK-34 company, which ordered him to transport the film from Armavir to Simferopol on October 6. As Readovka already wrote, the driver could have been on the Crimean bridge on October 7, Vladimir Putin's birthday, but stopped nearby for the night.

As Readovka found out, the head of TEK-34 is Oleg Aleksandrovich Antipov, and the company is registered in Ulyanovsk. Antipov has been in charge since November 13, 2020. Previously, the company was registered in the Volgograd region, but at the end of March 2022, the legal address was changed to Ulyanovsk.

For 2021, according to our data, the company's revenue was equal to zero, and the company itself is listed as unreliable, since it has not paid taxes for at least the last three years. On the forums of carriers, comments were written on behalf of the TEK-34 company in the period from 2018 to 2020 - on behalf of a certain Olga.

All this points to the work of the Ukrainian special services, whose involvement in the terrorist attack is no longer in doubt after publications in major Western publications. To implement their plan, they resorted to the use of a fly-by-night company, of which, unfortunately, there are a considerable number in Russia.

And today:

According to information from KP military correspondent Alexander Kots, the cargo, ordered by a citizen of Ukraine, arrived by sea from Bulgaria in the form of 22 pallets of film to Georgian Poti. After that, it was loaded onto a truck and sent to Armenia, where it was cleared according to the rules of the Customs Union. As a result, the truck again entered Georgia, and then crossed the border with the Russian Federation through the Upper Lars checkpoint and went to Armavir, where the cargo was transferred to another truck, which drove onto the Crimean bridge.

Most likely, the explosives were planted in rolls of film to avoid detection through x-rays. This happened in Bulgaria, which indicates the participation of foreign intelligence services in organizing the attack.