U.S. and allied intelligence officials are tracking an increase in low-level sabotage operations in Europe that they say are part of a Russian campaign to undermine support for Ukraine’s war effort.

The covert operations have mostly been arsons or attempted arsons targeting a wide range of sites, including a warehouse in England, a paint factory in Poland, homes in Latvia and, most oddly, an Ikea store in Lithuania.

But people accused of being Russian operatives have also been arrested on charges of plotting attacks on U.S. military bases.