West Ham have signed goalkeeper Darren Randolph following his exit from Birmingham City.
Swansea have signed England youth international Raheem Hanley from Blackburn Rovers, the Barclays Premier League club have announced.
The 19-year-old, who has signed a deal that keeps him at the Liberty Stadium until 2015, can play in defence or midfield and did not make any first-team appearances for Rovers.
With deals already done for David N'Gog of Bolton and Hearts' midfielder Adam King, Hanley - who was part of the Blackburn team that reached the final of the FA Youth Cup in 2012 - becomes Michael Laudrup's third signing of the January transfer window but is unlikely to go straight in to Laudrup's first-team set-up.
Swansea's 2-0 win over Fulham on Tuesday evening was their first league victory since December 4 as Laudrup looks to juggle a successful Premier League campaign with a tilt at Europa League success.
The reigning Capital One Cup holders will face a tough test against Rafael Benitez's Napoli side in the first knockout stage of the Europa League after the Swans came through a group including Valencia, Kuban Krasnodar and St Gallen.