At least three people have been killed and more than 100 injured, some seriously, in two explosions at the finish line of the Boston Marathon. TV footage showed bloodied runners and spectators being treated at the scene and the road strewn with debris. The FBI said that this was a "potential terrorist
CAUSING a splash, this determined kingfisher goes hunting for dinner .
This tranquil setting stretches for miles as the sun sets behind the mountain .
ROLLING across a 65-metre-high viaduct in the Alps, the red carriages of the Bernina Express add a splash of colour to the spectacular snow-covered Swiss surroundings .
STARING eagerly into the camera, this little toad is full of curiosity .
Beautiful turquoise waves rise and fall in a series of stunning images taken along the coastline of south-eastern Australia .
These are the amazing close up pictures of North Korea's mass games - after photographers were previously banned from taking shots so close to the dazzling formation dances .
A hungry hippo is seconds away from catching a bird in its gigantic jaws .
These are the faces of orphans suffering from the horrifying effects of chemical warfare .
A GLOWING range of greens and blues sweep across the sky in a spectacular display of light .
A British photographer has captured the beauty of London in a stunning series of landscapes shots .
SWIMMING in unison, millions of silverside fish dwarf the divers .
A curious red squirrel takes a break from collecting nuts and tries her hand at photography .