Russia prepares the pretext to invade Ukraine

The US has reports that Russia has pre-positioned a group of operatives to conduct a

.

CNN reports, citing American leaders.

The operatives, according to these sources, are trained in urban warfare and in the use of explosives to carry out acts of sabotage against the same forces supported by Russia. 

The information echoes a

that Russian intelligence is preparing

.

Yesterday, US security adviser

said that "the American intelligence community has developed information, now declassified, that Moscow is creating the ground for having the option of fabricating the pretext for an invasion", recalling the

.