Aston Villa have signed striker Jonathan Kodjia from Championship rivals Bristol City on a four-year contract, for an initial £11m fee that could rise to £15m.

The 26-year-old scored 20 goals in 52 games for the Robins, after signing from French club Angers in July 2015.

The Ivory Coast international had also been the subject of interest from Derby County and Premier League side Hull.