Sheffield Wednesday are furious after Steve Bruce's move to Newcastle United.
He quit the Owls to take over at Newcastle but the Championship club are unhappy with the terms of his departure.
"The club is disappointed to learn via public statement issued by Newcastle United that it has appointed former Sheffield Wednesday staff Steve Bruce, Steve Agnew and Steve Clemence.
"Regardless of the fact that the staff resigned from their positions with the club on Monday, there remains outstanding legal issues to be resolved between the club and the staff and Newcastle United.
"The club is currently considering its position and taking the appropriate legal advice."