Moscow — A Russian unmanned spacecraft docked at the International Space Station on Friday delivered nearly three tons of supplies to the crew. As scheduled, a Soyuz rocket carrying an unmanned Progress MS-20 ship was blown up from the Russian-leased Baikonur Cosmodrome in Kazakhstan. Approximately three and a half hours after launch, the spacecraft smoothly docked to the space outpost. It delivered food, fuel, and other supplies to the station’s international crew. Russia’s military operations in Ukraine have increased tensions in relations with the United States, but the Russian and American crew at the station are working as usual. Houston and Moscow flight controllers continued to work together as usual, according to NASA officials.