Ukraine's domestic intelligence agency, the SBU, carrying out a large scale operation Sunday targeting Russian military airfields.

Video shared with ABC News by the SBU shows aircraft being hit and bursting into flames. The attacks carried out at different airfields in five Russian regions, some home to Russian strategic bombers. 

A source within the SBU claims they hit more than 40 military aircraft that they say, bomb Ukrainian cities every night, a source in the SBU tells ABC News the operation had been planned for more than a year and a half. 

Drones were concealed inside makeshift mobile houses with retractable roofs, which were then placed on trucks. The Source said those rooms open remotely the drones flown out to strike, Russian officials are also investigating two train derailments they say happened after two bridges were blown up in separate Russian regions, this near the border with Ukraine. 

Meanwhile, Moscow continued its massive aerosol Ukrainian Air Force reported 479 drones and missiles were launched into the country overnight in one of the largest aerial attacks of the three year old war. 

Amid all of this volatility, Russia has proposed a new round of peace talks to be held in Istanbul on Monday, and two US senators who were in Kiev on Friday have warned Russian President Vladimir Putin is stalling on peace talks while preparing a new military offensive against Ukraine.

Ending this war the right way, makes the world safer. If you end it in a way like we did with Afghanistan, you're setting the world on fire. 

Putin will keep going, if he's not stopped in Ukraine, and then we will have to put troops on the ground by virtue of our treaty obligations. Senators say a sweeping US sanctions bill backed by 82 of their colleagues could be the last chance to sever the economic lifeline fueling Russia's war.