taken from BBC:

Large numbers of casualties have been reported after at least six explosions on the Underground network and a double-decker bus in London. all London Underground services have been suspended indefinitely and bus services in central London (Zone One) have been halted. A spokesman for Vodafone said emergency services were being given priority access to the mobile phone network which was causing problems for other users. One caller to BBC Five said his friend had seen "the bus ripped open like a can of sardines and bodies everywhere". Loyita Worley, who works for a City law firm, said she was on the underground train when an explosion took place in the next carriage, while it was in a tunnel. The 49-year-old said: "All the lights went out and the train came to an immediate halt. There was smoke everywhere and everyone was coughing and choking, but remained calm. We couldn't open the doors." Once the doors were opened they were taken along to Liverpool Street station.She said the carriage where an explosion happened was "black on the inside" she saw people who appeared to have their clothes blown off, and she saw bodies lying inside the carriage. And the Press Association quoted union officials as saying sources had told them there had been at least one explosive device on the Underground.

may we all have prayers for all those affected