West Ham have warned that they intend to issue a lifetime ban from the London Stadium to the fan who threw a coffee cup at Troy Deeney during Saturday's 2-0 Premier League defeat against Watford.

Hornets captain Deeney gave his side the lead when he slammed home a first-half penalty before charging towards the corner of the pitch.

The 30-year-old attempted a knee slide before punching the corner flag out of the ground and goading the home supporters, one of whom threw a paper cup in his direction.

Deeney made no apologies for his celebration, and West Ham have released a statement condemning the behaviour of the supporter and warning that they will take a "zero-tolerance" approach.

The statement read: "The Club is aware of the incident and will be working to identify the offender.

"In line with our zero tolerance approach, anyone identified will have their details passed to the police and will face a lifetime ban from London Stadium.

"There is no place for this kind of behaviour at our stadium.”

An FA spokesperson added: "The referee (Lee Mason) has reported the incident and we will be looking into it."

After the game, Deeney said of his celebration: "Other than the knee slide, where I nearly broke my knee, but people have an opinion on me and my family and that's the only way I can shut them up.

"I get in trouble sometimes but this one I'm all right."

The incident comes in the wake of Dele Alli being hit by a plastic bottle thrown by an Arsenal fan during Tottenham's 2-0 EFL Cup victory at the Emirates Stadium on Wednesday night.

Meanwhile, police have interviewed a person under caution in connection with the alleged racist abuse of Raheem Sterling during Manchester City's defeat by Chelsea earlier this month.

TV footage appeared to show at least one Chelsea fan directing racist language towards Sterling in the match at Stamford Bridge.

Chelsea suspended four supporters following the incident pending further investigations.

Additional reporting by the Press Association.