Lampard played down the bottle-throwing incident at Bramall Lane
|
Sheffield United have launched an investigation after a plastic bottle was thrown at Chelsea's Frank Lampard at Bramall Lane last Saturday.
The Football Association will ask the Blades for more information on the incident, which occurred when Lampard went to take a corner at the Kop end.
The club were unaware the event had happened until the England player told the press after the match.
Blues boss Jose Mourinho said the offender should be jailed.
He told the Daily Mail: "If we can catch him and send him home or get him to spend a night in jail, that would be perfect.
"But it wouldn't be fair to punish the club or 30,000 fans."
Lampard attempted to play down the incident, saying: "It was only a plastic water bottle and there are no hard feelings for me.
"I know it's not something you want to see but if it had landed on me I might have felt different.
"There was quite good banter in the far corner and nothing nasty aimed at me."
It is unlikely Sheffield United will face any action themselves.
An FA spokesman stated: "The important matter in occasions such as this is identifying the individual to ensure they are properly dealt with."