Birmingham City have made another addition to their squad with the arrival of defender Gavin Gunning.

The 23-year-old centre-back has joined on a free transfer from Dundee United and agreed a one-year deal, with a further 12-month option.

Dubliner Gunning, a former Republic of Ireland Under-21 international, becomes Blues manager Lee Clark's sixth signing of the summer.

Jonathan Grounds, Grant Hall, Stephen Gleeson, Wes Thomas and David Edgar have also made the move to St Andrew's as Clark rebuilds his squad following last year's battle against relegation.

Gunning began his career as a trainee at Blackburn and had loan spells with Tranmere, Rotherham, Bury and Motherwell before moving to Tannadice, where he made 101 appearances in three years.