24 hours in pictures

Boulder, US: A cloud hangs over students smoking cannabis during the annual "420" event at the University of Colorado Photograph: Mark Leffingwell/AP

Riga, Latvia: Orthodox priests and worshippers attend an Easter mass Photograph: Ints Kalnins/Reuters

Kremno, Belarus: A hunter places decoy ducks on the backwaters of the Pripyat river Photograph: Viktor Drachev/AFP/Getty Images

Kanchipuram, India: Two men at work at a silk dyeing works Photograph: /EPA

Jakarta, Indonesia: A boy swims in the polluted waters of the Pluit dam Photograph: Beawiharta/Reuters

Singapore: A waiter and a chef stand among empty tables in a restaurant during lunch hour Photograph: Wong Maye-E/AP

Kolkata, India: Rickshaw pullers run with their vehicles as they participate in an annual rickshaw race Photograph: Piyal Adhikary/EPA

Des Moines, US: Two competitors go head-to-head during the 30th Drake Relays Beautiful Bulldog Contest Photograph: Charlie Neibergall/AP

Johannesburg, South Africa: A girl blows out candles at her 12th birthday party at the Children of Fire centre for young people with burns Photograph: John Moore/Getty Images

Porto Empedocle, Italy: Police officers assist a man on a stretcher after he was rescued by the Italian navy from a cargo ship which has been stranded in the Mediterranean for days Photograph: Alessandro Fucarini/AP

Hanover, Germany: A robot penguin swims in a tank at an industrial fair Photograph: Fabian Bimmer/AP

Sintra, Portugal: An infant grabs the clarinet of a member of the Companhia Musicalmente during a concert for infants and babies Photograph: Nacho Doce/Reuters

Hillah, Iraq: Women walk in front of Saddam Hussein's former palace. Some of the surrounding villas have been converted into hotel rooms Photograph: Muhannad Fala'ah/Getty Images

Littleton, US: Garrett Bentley looks at a display of crosses for the 13 victims of the Columbine high school shooting, the 10th anniversary of which was yesterday Photograph: Jack Dempsey/AP