It is alleged Rooney dropped in on a wedding party, with the Sun newspaper printing a photo appearing to show the Manchester United forward, wearing an England training top, looking the worse for wear.

Another photo, used by the Mirror newspaper, showed Rooney's England team-mate Phil Jagielka, the Everton defender, pictured alongside him although not looking worse for wear.

The FA has confirmed that overnight free time, which has been in place for a number of years, will now be reviewed.

The allegations surrounding Rooney include the suggestion that members of England's backroom staff were with him at the wedding party.

Football Association chief executive Martin Glenn told Sky Sports News HQ on Thursday: "We're getting a proper investigation of what actually went on - 'were there other FA staff involved - yes or no?' - and we're doing a review of it obviously.

"It's disappointing. I think it's appropriate he apologised because it doesn't set a great tone for the England captain but, that said, I don't want to over-dramatise it either."

Klopp on Wayne Rooney drinking photos - cutting through the hyperbole to tell it how it is! pic.twitter.com/Y3pKCNAIFC

— This Is Anfield (@thisisanfield) November 17, 2016

Glenn added: "We're talking to anyone who was there on Saturday night to find out if anyone from the backroom staff was involved and then we'll take a view, but we don't know what the facts are yet."

"I think it'd be 'why on earth are you doing that given there is an understanding, a team agreement around alcohol consumption during camps?', so there would be questions asked for sure."

In contrast to the FA's stance, leading Premier League managers have defended Rooney.

Liverpool manager Jurgen Klopp believes a sense of perspective needs to be taken, and whatever went on was "not really serious".

"I know we're all on the sunny side of life, we earn a lot of money and do the job we love, but at the end maybe it comes as a surprise that we are also human beings too," the German said.

"These boys, this generation, is the most professional generation of footballers - not only in England, but (the) England (team), too, that there has ever been.

"All the guys, all the legends we love and admire they drank like devils and smoked like crazy, but they were still good players. No one does it any more. I don't know anyone now.

"We had a Christmas party and I had to fill people's glasses. It's about timing - when you are in the wrong time at the wrong place it's not good as a professional.

"I have no idea where Wayne was, but I'm pretty sure it's not really serious."

Despite Jagielka being involved, Everton boss Ronald Koeman played down the furore.

The Dutchman said: "It wasn't that big a problem for me with Phil. He was there and he had a drink, but it was after the match and the behaviour of Phil was not bad.

"Everybody needs to understand how dangerous is social media. You need to show always, to be an example for young people, as a football professional.

"But that is my opinion in general - with Phil, there is no problem. I spoke to him and the rest is between him and I."

Tottenham manager Mauricio Pochettino believes individuals must always be held accountable for their actions.

"You cannot control them. When you give the players a day off, it's not in your hands what they're doing," he said. "As a manager, as staff, as a club. It's their responsibility how they use their free time."

Burnley boss Shaun Dyche, meanwhile, feels the incident highlights "why players are unapproachable, because people want to make a bad story out of a good story".

He added: "If anyone wants to buy me a pint when I am out, they are more than welcome."

PA