The last time no party won enough seats to form a majority government was 2010, when David Cameron's Conservatives won 307 seats - 49 more than second-placed Labour, but too few to control the Commons.
He also claimed it is "pretty clear who won this election" and that "the party that has lost in this election is the Conservative Party".
May called the vote three years earlier than required by law, with the aim of sweeping an even greater majority for her party before Brexit talks in just eight days to take the country out of the European Union. "What the new set-up means for #Brexit we will have to wait and see", Dutch Prime Minister Mark Rutte said in a tweet. "Jeremy Corbyn is the big victor of the United Kingdom elections", announced daily newspaper La Vanguardia, in Spain's Catalonia region.
"Now, the prime minister has no authority and the Conservatives have no mandate", he said in a video message posted to Twitter on Friday.
May had spent the campaign denouncing Corbyn as the weak leader of a spendthrift party that would crash Britain's economy and flounder in Brexit talks, while she would provide "strong and stable leadership" to clinch a good deal for Britain.
Outside the EU, Russia's state-run daily newspaper Rossiyskaya Gazeta went further into casting doubt over May's role, speculating that the election could "be the end of her political career" although she has said she does not plan to step down. "Yet it has failed to win a majority in five of the past six general elections and it has left the country all but ungovernable as a effect of two extraordinary miscalculations".
European Council President Donald Tusk has warned there was "no time to lose" after May began the two-year countdown to Britain's withdrawal by triggering Article 50 of the EU's Lisbon Treaty on March 29.
Many senior DUP figures admire not only Mrs May's forthright unionism but her brand of One Nation Conservatism and her move away from some of the stridently individualistic Thatcherite rhetoric.
UK: What does Theresa May stand for?
The Prime Minister has announced her intention to form a minority government with support from the DUP's ten MPs.
Mrs May is seeking to rely on the Democratic Unionist Party's 10 MPs to win key votes in Parliament.
Politicians and citizens expressed concerns over the DUP's stance on various issues - it is anti-abortion, has railed against LGBT rights, and previously appointed a climate change denier as environment minister in Northern Ireland.
Fallon said the new government would require "a more collective approach", adding that he expected Conservative lawmakers to "rally behind" May when they meet next week.
Any boost May might have received from her reaction to the two terrorist attacks in recent weeks instead highlighted her own failings as former Home Secretary in allowing police numbers to be cut by 20,000 in seven years. "I think we'll know very shortly".
"That is why I think at this critical time for our country it is important to form a government in the national interest", she said. "Absolutely", 68-year-old Corbyn told the Sunday Mirror, still not giving up his dream of becoming the next British Prime Minister.
"Honestly, it feels nearly like she is nearly not aware of what has happened in the last 24 hours", she told LBC radio.
Former minister Anna Soubry said Mrs May should "consider her position" after a "dreadful campaign" while backbencher Heidi Allen suggested she could be out within a matter of months, depending on the Brexit negotiations.
London Bridge attacker tried to rent larger truck
Police are also appealing for information about the "distinctive" pink "Ernesto" brand knives the men were carrying. Armed police shot dead the three attackers just eight minutes after the first phone call from the public.
Predators on brink as Rinne struggles again in Pittsburgh
Predator coach Peter Laviolette, who talked to The AP, didn't put all the blame on Rinne. "It's not about me, it's all about us. Defensively, the Pittsburgh Penguins are allowing 2.8 goals per game and are killing 79.8 percent of their power play chances.