Lindsay Lohan: It's War with Egor Over My Topless Art

Lindsay Lohan's fiance, Egor Tarabasov, moved out of their apartment Tuesday and she claims he tried to make off with some of her stuff.

As we previously reported ... LiLo skipped town Monday after their blowout, but we're told she had staff at the London pad when Egor and his mother returned for his things.

The staffers told Lindsay, Egor and Elena were trying to take her prized Marilyn Monroe pop art. The custom painting was done by street artist Pegasus and is based on Lindsay's 2012 Playboy shoot.

Lindsay's dad, Michael, fired off a series of scathing texts to Egor over the weekend ... and we're told he sent another today to Egor and his mother, accusing them of jacking the painting.

We've reached out to Egor multiple times, but still no reply.