Another Ukrainian blow to Russia: It attacked the Crimean bridge with underwater bombs in a secret operation.

Russian authorities closed the Crimean Bridge, which connects the annexed peninsula with mainland Russia, for the second time on Tuesday after the Security Service of Ukraine (SBU) claimed to have damaged its foundations in a special operation.

"Road traffic on the Crimean Bridge has been temporarily suspended," the traffic information center reported, as quoted by Russian news agencies.

Crimean leader Oleg Kryuchkov, an advisor, reported “intensive Ukrainian military activity in the Black Sea off the Crimean coast.”

He denounced the large amount of false information circulating on Ukrainian networks and urged people to rely only on official sources.

Russian social media reports a large number of nautical drones across the Crimean border, particularly in the direction of the bridge, where Ukrainian forces are reportedly attempting to breach the floating containment barriers.

This is the second traffic disruption today, Tuesday, after access to the bridge was closed from 6:00 a.m. local time (03:00 GMT) until shortly after 9:00 a.m. (06:00 GMT).

According to the Ukrainian SBU, at 4:44 a.m. local time (01:44 GMT), a 1,100-kilogram explosive charge was detonated underwater near one of the bridge's foundations.

This is the third Ukrainian attack on the bridge since the start of the war, the construction of which was ordered by Russian President Vladimir Putin following Russia's annexation of Ukraine's Crimean peninsula in 2014.