The incident further inflamed tensions between Hungary and Ukraine, which are embroiled in a bitter feud over Hungary’s access to Russian oil through a pipeline that crosses Ukrainian territory. Hungarian authorities have detained seven Ukrainian citizens, including a former intelligence officer, and seized two armored cars carrying large amounts of cash across Hungary on suspicion of money laundering, officials said Friday. Ukraine accused Hungary of taking the Ukrainians hostage and illegally seizing millions of dollars in cash. “This is state terrorism and racketeering,” Ukraine’s Foreign Minister Andrii Sybiha wrote on X late Thursday. The seven were employees of the Ukrainian...