Foreign investors are pouring money into downtown D.C. office buildings even as many properties in the Washington suburbs struggle with stagnant leasing and growing vacancy, The Washington Post reports.

Overseas investors have purchased or are under contract to buy nearly $1.9 billion in Washington office properties so far in 2013, according to data assembled by the services firm Jones Lang LaSalle.

That tops the total of $1 billion for all of last year and is more than double the $807 million that foreign investors put up in all of 2011.