An hour-by-hour summary of events on the day of the London bombings, Thursday 7 July 2005.
8.49am - Reports of an explosion on the London Underground on the Metropolitan Line.
9.15am - Emergency services called to Liverpool Street Station.
9.33am - All London Underground trains stopped
9.33am - Another 'incident' is reported at Edgware Road station.
10.14am - Another explosion reported on a bus in Tavistock Place, in central London.
10.21 - Police confirm there have been "multiple explosions" in London.
11.08am - All buses in Central London stopped.
11.29am - Head of the Metropolitan Police confirms six blasts have hit London's transport system.
11.40am - Two people confirmed dead at Aldgate Station.
12.00am - Prime Minister Tony Blair announces the blasts are thought to be terrorist attacks.
12.14pm - Police confirm seven blasts. Six tube stations were hit; Edgware Road, King's Cross, Liverpool Street, Moorgate and Aldgate East. A bus was destroyed in Tavistock Square.
12.57pm - Home Secretary Charles Clarke tells the House Of Commons that there were at least four explosions.
1.13pm - Mayor of London, Ken Livingstone, says the city has been the target of a
"cowardly terrorist attack".
1.25pm - Prime Minister Tony Blair boards a helicopter to leave the G8 Summit in Scotland and return briefly to London.
1.33pm - US President George Bush makes a speech in Scotland condemning the attacks, and says hey show the war on terror must continue.
1.44pm - The Archbishop of Canterbury, Dr Rowan Williams, says the blasts are appalling. He calls for all religious leaders to work together.
2.18pm - A Transport for London spokeswoman says the bus hit by the explosion was a number 30, travelling from Hackney to Marble Arch.
3.35pm - Police confirm that at least 33 people were killed in the four explosions.
3.45pm - The ambulance service says it has treated 45 people for serious or critical injuries and a further 300 for minor injuries.
4.35pm - It is announced that the Union Jack flag above Buckingham Palace is being lowered to half-mast as a mark of respect to the dead and injured.
5.30pm - Prime Minister Tony Blair promises there will be the "most intense police and security service action to make sure we bring those responsible to justice".
6.30pm - Police say the total number of casualties was 700 and, of those, 300 were taken
to hospital by ambulance.
7.40pm - Home Secretary Jack Straw says it looks like the attacks were carried out by al-Qaeda.
7.47pm - The Queen announces she will visit some of the people caught up in the attacks on Friday.
9.05pm - Tony Blair returns to the G8 summit in Scotland.
11.41pm - Police reopen most of the roads they closed in central London. But cordons remain in place in Woburn Place, Tavistock Place, Burton Street and Flaxman Terrace.