Today in Pictures: June 12

A massacre in Orlando stuns the nation, the Queen celebrates her birthday in London, and more of Sunday's best photos.

President Barack Obama approaches the podium for a statement regarding the Orlando nightclub shootings on June 12, 2016 at the White House. At least 50 people were killed and 53 were injured after suspected gunman Omar Mateen opened fire in a gay nightclub in Orlando, Florida in what is the worst mass shooting in U.S. history. 

Obama called the shooting an "an act of terror and an act of hate."

PHOTOS: Gunman Opens Fire at Orlando Nightclub

Alex Wong / Getty Images
Jeffery Greamo, left, and Jon Paul join in a moment of silence for the victims of the mass shooting at Orlando's Pulse nightclub during a Pride Month block party in Boston on June 12. BRIAN SNYDER / Reuters
Rubel, 12, looks towards the camera as he works at a factory that makes metal utensils in Dhaka, Bangladesh, on June 12. He earns less than $5 per day. The World Day Against Child Labor, which was initiated in 2002 by the International Labor Organization to highlight the plight of child laborers, was observed across the world on Sunday. A.M. Ahad / AP

Britain's Queen Elizabeth and Prince Philip wave to guests attending the Patron's Lunch on the Mall, an event to mark her 90th birthday, in London, on June 12.

Queen Elizabeth II's subjects serenaded her with impromptu renditions of "Happy Birthday," on Sunday, as the monarch slowly drove past some 10,000 people attending a massive street fair in her honor.

The drive past in the "Queen mobile" was the highlight of the party on The Mall, the road leading to Buckingham Palace. The picnic is the grand finale of a weekend of official events marking the monarch's 90th birthday and celebrated some 600 charities to which she lends her patronage.

A man is flipped into water by others at a beach in Colombo, Sri Lanka on June 12. DINUKA LIYANAWATTE / Reuters
Civil defense members and rescuers push a car at a site hit by air strikes in Idlib, Syria, on June 12. The U.N. estimates that 592,700 people live under siege in Syria, with about 452,700 of them under blockades by government forces. AMMAR ABDULLAH / Reuters
A bomb disposal expert checks luggage near the site of a blast at a terminal in Shanghai's Pudong International Airport on June 12. A man set off a home-made explosive at the terminal, the city's government said, injuring five people, including himself. ALY SONG / Reuters

The sun rises as Samaritan worshippers gather to pray on top of Mount Gerizim, near the northern West Bank city of Nablus, to celebrate the Shavuot festival on June 12. Shavuot marks the giving of the Torah at Mount Sinai seven weeks after the exodus of the Jewish people from Egypt. The Samaritans practice a religion that is based on four principles of faith, one God - the God of Israel; one Prophet - Moses Ben Amram; the belief in the Torah - the first five books of the Bible, and one holy place - Mount Gerizim.

Saturday in Pictures: June 11