British police opened investigations Monday into the racist abuse of three Black players who failed to score penalties in England’s shootout loss to Italy in the European Championship final.

The Metropolitan Police condemned the “unacceptable” abuse of Marcus Rashford, Jadon Sancho and Bukayo Saka, and said they will be investigating the “offensive and racist” social media posts published soon after Italy won Sunday’s shootout 3-2 following a 1-1 draw. A mural of Rashford on the wall of a cafe in south Manchester was also defaced with graffiti in the wake of the match.

The racist abuse, which was condemned as “unforgivable” by England coach Gareth Southgate, has led to calls for social media companies, such as Facebook and Twitter, to do more in hunting down the perpetrators of the abuse.

All three players targeted are part of a young England squad that has been widely praised for its diversity and social conscience. Rashford, for one, has been at the forefront of a campaign against child poverty, which convinced the British government to restore free lunches for thousands of poor children amid the coronavirus pandemic.

“We have been a beacon of light in bringing people together, in people being able to relate to the national team, and the national team stands for everybody and so that togetherness has to continue,” Southgate said Monday.

In a powerful statement released on Twitter on Monday, Rashford wrote, "I can take critique of my performance all day long ... but I will never apologise for who I am and where I came from."

Rashford also shared pictures of letters from children that he received, including one from a 9-year-old that read: "I hope you won't be sad for long because you are such a good person. Last year you inspired me to help people less fortunate. Then last night you inspired me again, to always be brave. I'm proud of you, you will always be a hero."

A mural of Rashford, which was defaced following England's loss to Italy, was covered with positive messages, including ones that say "Hero," "You are my inspiration," and "You are still a star in our eyes."

The abuse was widely condemned, with Prince William, the president of the English Football Association, saying he was “sickened” by the racism aimed at the England players.

“It is totally unacceptable that players have to endure this abhorrent behaviour,” he wrote on Twitter. “It must stop now and all those involved should be held accountable.”

British Prime Minister Boris Johnson on Monday told those who directed racist abuse at some of the players that he hoped “you will crawl back under the rock from which you emerged.”

But he has faced criticism for emboldening those booing the England team for taking a knee before their matches to protest against racial injustice.

Last month, Johnson’s spokesman said the prime minister is “more focused on action rather than gestures.” That comment led to widespread criticism that Johnson was effectively encouraging those booing to carry on. Three days later, his spokesman changed tack, saying the prime minister “respects the right of all people to peacefully protest and make their feelings known about injustices” and that he wanted them to cheer the team and “not boo.”

Keir Starmer, leader of the main opposition Labour Party, accused Johnson of a failure of leadership for not calling out the booing of the England team.

“The prime minister failed to call that out and the actions and inactions of leaders have consequences, so I’m afraid the prime minister’s words today ring hollow,” he said.

Gary Neville, a former Manchester United player and now a TV commentator, said he wasn’t surprised that the three players who failed to convert their penalties were targeted for racist abuse and also called out Johnson.

“The prime minister said it was OK for the population of this country to boo those players who are trying to promote equality and defend against racism,” he said on Sky News. “It starts at the very top and so for me I wasn’t surprised in the slightest that I woke up this morning to those headlines.”

In recent years, soccer authorities in England have joined with the players in trying to tackle racism both within the sport — at every level — and in society as a whole.

The English FA said it will give the players affected what support it can and will press on authorities for the “toughest punishments possible” for anyone found to have been responsible for the abuse.

“We will continue to do everything we can to stamp discrimination out of the game, but we implore government to act quickly and bring in the appropriate legislation so this abuse has real life consequences,” it said.

Social media companies, it said, need to “step up and take accountability and action to ban abusers from their platforms” to ensure that their platforms are “free from this type of abhorrent abuse.”

London Mayor Sadiq Khan also called on social media companies to do more to hold offenders to account.

“There is absolutely no place for racism in football or anywhere else," he wrote in a Twitter post. "Those responsible for the disgusting online abuse we have seen must be held accountable - and social media companies need to act immediately to remove and prevent this hate.”

Facebook, which owns Instagram, said Monday it tried to remove harmful content as quickly as possible and encouraged people to use the tools it offers to block abuse.

“We quickly removed comments and accounts directing abuse at England’s footballers last night and we’ll continue to take action against those that break our rules,” it said in a statement.

Twitter said the “abhorrent racist abuse” has no place on its platform, adding it removed more than 1,000 tweets and permanently suspended a number of accounts for violating its rules.

“We will continue to take action,” Twitter said, “when we identify any tweets or accounts that violate our policies.”

The British government is planning new laws to enshrine a new legal duty of care on online companies to protect users from harm, including people receiving abusive comments, threats and harassment.