London - Chelsea will challenge a transfer ban from FIFA at the Court of Arbitration for Sport (CAS), the London club said Wednesday after football's world governing body rejected a first appeal.

The ban on Chelsea signing players over the next two transfer windows remained largely in place after FIFA issued their ruling earlier on Wednesday.

In February, the Blues were banned from signing players for their men's teams for the next two transfer windows after being found guilty by FIFA's disciplinary committee of breaching regulations relating to the recruitment of minors.

Chelsea denied any wrongdoing and appealed.

On Wednesday, the governing body of world soccer announced that its appeal committee had "decided to partially uphold the appeal".

The committee lifted part of the ban, but only for players under 16 who are not "international transfers and first registrations of foreign minor players".

That means Chelsea will still not be able to sign male players over the age of 16 when the summer transfer window opens.

Chelsea responded to FIFA'a decision by saying they intended to lodge the transfer ban with CAS.

"The club notes that the FIFA appeal committee has decided to partially uphold the appeal lodged by Chelsea FC against the decision of the FIFA disciplinary committee," the Blues said in a statement.

"However, the club is very disappointed that the transfer ban of two consecutive registration periods was not overturned," it added.

"Chelsea FC categorically refutes the findings of the FIFA appeal committee.

"It acted in accordance with the relevant regulations and will appeal the decision to the Court of Arbitration for Sport (CAS)."

Chelsea had been eager to have the ban lifted, or suspended pending an appeal, so they could be in a position to sign a replacement for Belgium's Eden Hazard, who is being touted as a possible £100 million transfer target for Real Madrid.

The appeal committee also confirmed the fine of 600,000 Swiss francs.