Russian President Vladimir Putin and FIFA President Gianni Infantino have launched the volunteer program for the 2018 World Cup in Russia.

Wednesday's ceremony at an open-air theater in Moscow marks the start of recruitment of the 15,000 volunteers who will work at the World Cup and 5,000 for next year's Confederations Cup.

Putin says Russia will finish construction of all 12 stadiums on time despite recent reports of delays to some arenas.

Infantino says the "world will witness a welcoming Russia, a warm Russia, a Russia that is open to the world" at the tournament.