A Parliamentary safety group is urging London Mayor Boris Johnson to hold a safety summit following the spate of cyclists' deaths in the capital.
There was "a need for urgent action", said the Parliamentary Advisory Council for Transport Safety (Pacts) which has written to Mr Johnson.
Pacts executive director David Davies said: "The boom in cycling in London has many benefits and we support it but the tragic events of the past few days show that there is a need for urgent action.
"We are therefore calling on the mayor to convene a cycling safety summit to see what can be done immediately to make cyclists safer.
"It is essential that actions are based on good evidence and well targeted. We must avoid knee-jerk reactions and measures that might be counterproductive."
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