West Ham are investigating claims striker Andy Carroll and goalkeeper Darren Randolph were drunk on Tuesday afternoon following a club sanctioned night out on Monday.
There were conflicting reports on social media and manager Slaven Bilic likely has questions for the pair.
The Hammers have lost five of their six Premier League games this season, including four in a row, and play Middlesbrough on Saturday in their new London Stadium home.
A West Ham United spokesman said: “The club will be looking into these allegations and will deal with the players as we see fit.”
Carroll, who is currently out with a knee injury, posted a series of posts on Twitter, with fans replying asking if he was drunk.
When it was suggested he was, in fact, in a coffee shop, Carroll replied: “I seriously need to sort my parties out!! Sorry lads.”
He added: “Back in the day my parties had the wish I was there effect!”
— Andy Carroll (@AndyTCarroll) September 27, 2016
He then posted an image of his cracked phone screen and re-tweeted a post by a West Ham fan, who had the handle @Monkeyboy_WHU.
“@AndyTCarroll brilliant that so many fall for this s**** about u & @RandzOfficial!”