Hull City have signed Dieumerci Mbokani and Markus Henriksen on loan, while Manchester United's James Weir has joined for an undisclosed fee.
Dynamo Kiev striker Mbokani, 30, scored seven goals in 29 Premier League games during a spell with Norwich last season, and returns until next summer.
Attacking midfielder Henriksen, 24, arrives from AZ Alkmaar in a deal that will become permanent in January.
Midfielder Weir, 21, has agreed a three-year contract with the Tigers.
Hull had not made a summer signing until Tuesday when United striker Will Keane, Spurs midfielder Ryan Mason and Cardiff keeper David Marshall joined.