24 hours in pictures

Altay, China: Kazakh nomads herd their livestock across a plain in the Xinjiang region Photograph: AFP/Getty Images

Ecuador: A crimson-rumped toucanet (Aulacorhynchus haematopygus) at the Paz de las Aves bird reserve Photograph: Rodrigo Buendia/AFP/Getty Images

Madrid, Spain: Justin Bieber's fans gather outside Vertice Studios Photograph: Pablo Blazquez Dominguez/Getty Images

Afghanistan: A local commander of the Afghan Security Group, a local militia force, scans the terrain around the Mustang observation post in Kunar province Photograph: Tim Wimborne/Reuters

Sana'a, Yemen: A malnourished child attends a therapeutic feeding centre at al-Sabyeen hospital Photograph: Mohamed Al-Sayaghi/Reuters

Hong Kong, China: A schoolgirl arranges roses while another distributes leaflets ahead of a candlelit vigil to mark the 1989 crackdown on the pro-democracy movement in Tiananmen Square Photograph: Philippe Lopez/AFP/Getty Images

Tel Aviv, Israel: An man digs a hole in the sand on the city's beach Photograph: Oded Balilty/AP

Mumbai, India: A married Hindu woman performs a ritual next to a banyan tree Photograph: Indranil Mukherjee/AFP/Getty Images

Midway Atoll: Surrounded by albatross chicks, musician Kevin Crasy of the US Pacific Fleet, plays at a ceremony to commemorate the 70th anniversary of the battle of Midway Photograph: Marco Garcia/Reuters

Pathum, Thailand: Buddhist monks meditate during a ceremony on Vesak day, an annual celebration of Buddha's birth, enlightenment and death, at the Wat Phra Dhammakaya temple Photograph: Sukree Sukplang/Reuters

Kiev, Ukraine: Riot police separate opponents and advocates of the Russian language bill outside the country's parliament Photograph: Efrem Lukatsky/AP

Phnom Penh, Cambodia: An environmental activist wears a mask symbolising a wild animal during a rally to mark world environment day Photograph: Heng Sinith/AP

Cairo, Egypt: Protesters rest in Tahrir square during a demonstration against the verdict passed on Hosni Mubarak Photograph: Suhaib Salem/Reuters

Tiquipaya, Bolivia: Supporters of President Evo Morales attend his meeting with social organisations during the 42nd assembly of the Organisation of American States Photograph: Juan Karita/AP