During World War II, Latvia was occupied by the Soviet Union in June 1940 and then was occupied by Nazi Germany in 1941–1944. On 17 June 1940, the Soviet forces invaded Latvia occupying bridges, post/telephone, telegraph, and broadcasting offices. Three days later, Latvian president Karlis Ulmanis was forced to approve a pro-Soviet government which had taken office. On 14–15 July, rigged elections were held in Latvia and the other Baltic states, The ballots held the following instructions: "Only the list of the Latvian Working People's Bloc must be deposited in the ballot box. The ballot must be deposited without any changes." The alleged voter activity index was 97.6%. Most notably, the complete election results were published in Moscow 12 hours before the election closed. Soviet electoral documents found later substantiated that the results were completely fabricated. The Soviet authorities, having regained control over Riga and Latvia imposed a regime of terror, opening the headquarters of the KGB, massive deportations started. Hundreds of men were arrested, including leaders of the former Latvian government. The most notorious deportation, the June deportation took place on 13 and 14 June 1941, estimated at 15,600 men, women, and children, and including 20% of Latvia's last legal government. Similar deportations were repeated after the end of WWII. The building of the KGB located at 61 Brīvības iela, known as 'the corner house', is now a museum. Stalin's deportations also included thousands of Latvian Jews. (The mass deportation totalled 131,500 across the Baltics.) 