Prime Minister Tony Blair said Thursday he hoped that London would return to normal "as soon as possible" afterat midday.
"We can't minimize incidents such as this," Blair said during a news conference with visiting Australian Prime Minister John Howard. "They're done to scare people, to frighten them and make them worried."
One injury was reported in the Thursday
Blair said the police and security services were "fairly clear" on what happened and what the next steps were, and it was "important to respond by keeping to our normal lives."
He said it was too early to speculate onfor the attacks.
Howard told Blair that Australia would remain a "steadfast partner" with Britain in the fight against terrorism.
"Terrorism is an enemy to all free people," Howard said. "Terrorism is not just about individual circumstances and individual events."
As Blair prepared to deliver his statements Thursday, police escorted a man away from his Downing Street residence.
A police officer near the end of the street drew a firearm and aimed it at a target beyond the range of television cameras. Another officer then led away a man whose black shirt was undone. The man also wore black trousers and appeared to be of Asian or Middle Eastern origin.
Thursday's explosions or attempted explosions occurred nearly at the same time, Metropolitan Police Commissioner Ian Blair said.
Ian Blair said the lunch hour transit attacks were "pretty close to simultaneous."