West Ham have signed Nottingham Forest winger Michail Antonio and Hull striker Nikica Jelavic and completed loan deals for Barcelona midfielder Alex Song and Chelsea and Nigeria winger Victor Moses. Antonio, 25, has moved to the Hammers for an undisclosed fee, reported to be £7m, while 30-year-old Jelavic moves in a transfer worth about £3m. Song, 27, and Moses, 24, have joined the club on season-long loan deals. Antonio has signed a four-year deal with a further two-year option. Croatia international Jelavic has joined on an initial two-year contract with an option for a further two years. Song returns to Upton Park after making 31 appearances for the club in all competitions during a loan spell in 2014-15. Moses, who had loan spells at Liverpool in 2013-14 and Stoke last season, moves to West Ham on loan after signing a new four-year deal with his parent club. The Hammers have allowed midfielder Matt Jarvis, 29, to join Norwich City on a season-long loan. Londoner Antonio, who began his career at non-league Tooting & Mitcham United, has scored four goals in five matches for Forest this season. “I can’t wait for the challenge of playing in the Premier League,” he told West Ham TV. “It was one of the things growing up – I wanted to test myself against the best. “I’ve worked my way from non-league and finally got to the Premier League to show what I can do.” Antonio said his main attributes were “pace, power and goals”. “I came to a couple of games here when I was younger, so I’m happy to be finally here,” he added.